[{"translated_youtube_id": "QhiVnFvshZg", "relative_url": "/video/circulatory-system-and-the-heart", "has_questions": false, "keywords": "heart, blood, vein, artery, pulmonary, atrium, ventricle", "ka_url": "http://www.KhanAcademy.org/video/circulatory-system-and-the-heart", "duration": 897, "translated_title": "Circulatory system and the heart", "translated_description_html": "Introduction to the circulatory system and the heart", "id": "23990", "description_html": "Introduction to the circulatory system and the heart", "title": "Circulatory system and the heart", "progress_key": "v23990", "edit_slug": "edit/v/23990", "author_names": ["Sal Khan"], "deleted_mod_time": "2013-07-13T00:03:08Z", "description": "Introduction to the circulatory system and the heart", "extra_properties": null, "node_slug": "v/circulatory-system-and-the-heart", "deleted": false, "backup_timestamp": "2013-09-23T10:33:40Z", "date_added": "2011-02-20T16:31:16Z", "download_urls": {"mp4": "http://s3.amazonaws.com/KA-youtube-converted/QhiVnFvshZg.mp4/QhiVnFvshZg.mp4", "png": "http://s3.amazonaws.com/KA-youtube-converted/QhiVnFvshZg.mp4/QhiVnFvshZg.png", "m3u8": "http://s3.amazonaws.com/KA-youtube-converted/QhiVnFvshZg.m3u8/QhiVnFvshZg.m3u8"}, "translated_youtube_lang": "en", "kind": "Video", "url": "http://www.youtube.com/watch?v=QhiVnFvshZg&feature=youtube_gdata_player", "ka_user_license": "cc-by-nc-sa", "global_id": "v23990", "sha": "d6483ee6ad4bbd4b840674127723f3f168920f4c", "translated_description": "Introduction to the circulatory system and the heart", "image_url": "https://img.youtube.com/vi/QhiVnFvshZg/hqdefault.jpg", "youtube_id": "QhiVnFvshZg", "position": 1, "content_kind": "Video", "readable_id": "circulatory-system-and-the-heart"}, {"translated_youtube_id": "7b6LRebCgb4", "relative_url": "/video/arteries-vs--veins---what-s-the-difference", "has_questions": "live", "keywords": "", "ka_url": "http://www.KhanAcademy.org/video/arteries-vs--veins---what-s-the-difference", "duration": 669, "translated_title": "Arteries vs. veins - what's the difference?", "translated_description_html": "Learn some important differences between arteries (high pressure/low volume) and veins (low pressure/high volume). Rishi is a pediatric infectious disease physician and works at Khan Academy.", "id": "1036157588", "description_html": "Learn some important differences between arteries (high pressure/low volume) and veins (low pressure/high volume). Rishi is a pediatric infectious disease physician and works at Khan Academy.", "title": "Arteries vs. veins - what's the difference?", "progress_key": "v1036157588", "edit_slug": "edit/v/1036157588", "author_names": ["Rishi Desai"], "deleted_mod_time": "2013-07-13T00:03:08Z", "description": "Learn some important differences between arteries (high pressure/low volume) and veins (low pressure/high volume). Rishi is a pediatric infectious disease physician and works at Khan Academy.", "extra_properties": null, "node_slug": "v/arteries-vs--veins---what-s-the-difference", "deleted": false, "backup_timestamp": "2013-09-23T10:33:40Z", "date_added": "2012-09-13T21:08:09Z", "download_urls": {"mp4": "http://s3.amazonaws.com/KA-youtube-converted/7b6LRebCgb4.mp4/7b6LRebCgb4.mp4", "png": "http://s3.amazonaws.com/KA-youtube-converted/7b6LRebCgb4.mp4/7b6LRebCgb4.png", "m3u8": "http://s3.amazonaws.com/KA-youtube-converted/7b6LRebCgb4.m3u8/7b6LRebCgb4.m3u8"}, "translated_youtube_lang": "en", "kind": "Video", "url": "http://www.youtube.com/watch?v=7b6LRebCgb4&feature=youtube_gdata_player", "ka_user_license": "cc-by-nc-sa", "global_id": "v1036157588", "sha": "595d77aab17e8acb9c8d7e46affd3924b6bd0050", "translated_description": "Learn some important differences between arteries (high pressure/low volume) and veins (low pressure/high volume). Rishi is a pediatric infectious disease physician and works at Khan Academy.", "image_url": "https://img.youtube.com/vi/7b6LRebCgb4/hqdefault.jpg", "youtube_id": "7b6LRebCgb4", "position": 2, "content_kind": "Video", "readable_id": "arteries-vs--veins---what-s-the-difference"}, {"translated_youtube_id": "VMwa6yC3r-s", "relative_url": "/video/layers-of-a-blood-vessel", "has_questions": false, "keywords": "", "ka_url": "http://www.KhanAcademy.org/video/layers-of-a-blood-vessel", "duration": 611, "translated_title": "Layers of a blood vessel", "translated_description_html": "Remember the 3 key layers of a blood vessel (Tunica intima, Tunica media, and Tunica externa) and how arteries, veins, and capillaries are all different from one another. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "id": "1036278079", "description_html": "Remember the 3 key layers of a blood vessel (Tunica intima, Tunica media, and Tunica externa) and how arteries, veins, and capillaries are all different from one another. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "title": "Layers of a blood vessel", "progress_key": "v1036278079", "edit_slug": "edit/v/1036278079", "author_names": ["Rishi Desai"], "deleted_mod_time": "2013-07-13T00:03:08Z", "description": "Remember the 3 key layers of a blood vessel (Tunica intima, Tunica media, and Tunica externa) and how arteries, veins, and capillaries are all different from one another. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "extra_properties": null, "node_slug": "v/layers-of-a-blood-vessel", "deleted": false, "backup_timestamp": "2013-09-23T10:33:39Z", "date_added": "2012-09-13T21:08:40Z", "download_urls": {"mp4": "http://s3.amazonaws.com/KA-youtube-converted/VMwa6yC3r-s.mp4/VMwa6yC3r-s.mp4", "png": "http://s3.amazonaws.com/KA-youtube-converted/VMwa6yC3r-s.mp4/VMwa6yC3r-s.png", "m3u8": "http://s3.amazonaws.com/KA-youtube-converted/VMwa6yC3r-s.m3u8/VMwa6yC3r-s.m3u8"}, "translated_youtube_lang": "en", "kind": "Video", "url": "http://www.youtube.com/watch?v=VMwa6yC3r-s&feature=youtube_gdata_player", "ka_user_license": "cc-by-nc-sa", "global_id": "v1036278079", "sha": "3d8bb871360a3720e092231912498591568f04a6", "translated_description": "Remember the 3 key layers of a blood vessel (Tunica intima, Tunica media, and Tunica externa) and how arteries, veins, and capillaries are all different from one another. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "image_url": "https://img.youtube.com/vi/VMwa6yC3r-s/hqdefault.jpg", "youtube_id": "VMwa6yC3r-s", "position": 3, "content_kind": "Video", "readable_id": "layers-of-a-blood-vessel"}, {"translated_youtube_id": "iqRTd1NY-pU", "relative_url": "/video/arteries--arterioles--venules--and-veins", "has_questions": false, "keywords": "", "ka_url": "http://www.KhanAcademy.org/video/arteries--arterioles--venules--and-veins", "duration": 463, "translated_title": "Arteries, arterioles, venules, and veins", "translated_description_html": "Learn the differences between these blood vessels! Rishi is a pediatric infectious disease physician and works at Khan Academy.\n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "id": "x7ac317cf", "description_html": "Learn the differences between these blood vessels! Rishi is a pediatric infectious disease physician and works at Khan Academy.\n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "title": "Arteries, arterioles, venules, and veins", "progress_key": "vx7ac317cf", "edit_slug": "edit/v/x7ac317cf", "author_names": ["Rishi Desai"], "deleted_mod_time": "2013-07-13T00:03:07Z", "description": "Learn the differences between these blood vessels! Rishi is a pediatric infectious disease physician and works at Khan Academy.\n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "extra_properties": {"original_url": ""}, "node_slug": "v/arteries--arterioles--venules--and-veins", "deleted": false, "backup_timestamp": "2013-09-22T10:35:40Z", "date_added": "2013-03-20T23:39:54Z", "download_urls": {"mp4": "http://s3.amazonaws.com/KA-youtube-converted/iqRTd1NY-pU.mp4/iqRTd1NY-pU.mp4", "png": "http://s3.amazonaws.com/KA-youtube-converted/iqRTd1NY-pU.mp4/iqRTd1NY-pU.png", "m3u8": "http://s3.amazonaws.com/KA-youtube-converted/iqRTd1NY-pU.m3u8/iqRTd1NY-pU.m3u8"}, "translated_youtube_lang": "en", "kind": "Video", "url": "http://www.youtube.com/watch?v=iqRTd1NY-pU&feature=youtube_gdata_player", "ka_user_license": "cc-by-nc-sa", "global_id": "vx7ac317cf", "sha": "a6fcbb9a4a6b1a5ad344d7f74f57264acc1c1090", "translated_description": "Learn the differences between these blood vessels! Rishi is a pediatric infectious disease physician and works at Khan Academy.\n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "image_url": "https://img.youtube.com/vi/iqRTd1NY-pU/hqdefault.jpg", "youtube_id": "iqRTd1NY-pU", "position": 4, "content_kind": "Video", "readable_id": "arteries--arterioles--venules--and-veins"}, {"translated_youtube_id": "hSkIG4MdKqU", "relative_url": "/video/three-types-of-capillaries", "has_questions": false, "keywords": "", "ka_url": "http://www.KhanAcademy.org/video/three-types-of-capillaries", "duration": 557, "translated_title": "Three types of capillaries", "translated_description_html": "Learn the differences between continuous, fenestrated, and discontinuous capillaries, and how they affect the movement of molecules. Rishi is a pediatric infectious disease physician and works at Khan Academy.\n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "id": "x6451892a", "description_html": "Learn the differences between continuous, fenestrated, and discontinuous capillaries, and how they affect the movement of molecules. Rishi is a pediatric infectious disease physician and works at Khan Academy.\n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "title": "Three types of capillaries", "progress_key": "vx6451892a", "edit_slug": "edit/v/x6451892a", "author_names": ["Rishi Desai"], "deleted_mod_time": "2013-07-13T00:03:08Z", "description": "Learn the differences between continuous, fenestrated, and discontinuous capillaries, and how they affect the movement of molecules. Rishi is a pediatric infectious disease physician and works at Khan Academy.\n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "extra_properties": {"original_url": ""}, "node_slug": "v/three-types-of-capillaries", "deleted": false, "backup_timestamp": "2013-09-22T10:35:39Z", "date_added": "2013-03-20T23:40:13Z", "download_urls": {"mp4": "http://s3.amazonaws.com/KA-youtube-converted/hSkIG4MdKqU.mp4/hSkIG4MdKqU.mp4", "png": "http://s3.amazonaws.com/KA-youtube-converted/hSkIG4MdKqU.mp4/hSkIG4MdKqU.png", "m3u8": "http://s3.amazonaws.com/KA-youtube-converted/hSkIG4MdKqU.m3u8/hSkIG4MdKqU.m3u8"}, "translated_youtube_lang": "en", "kind": "Video", "url": "http://www.youtube.com/watch?v=hSkIG4MdKqU&feature=youtube_gdata_player", "ka_user_license": "cc-by-nc-sa", "global_id": "vx6451892a", "sha": "a2910159898ae12e5cc33fbf7c9c6bd8cc858a7e", "translated_description": "Learn the differences between continuous, fenestrated, and discontinuous capillaries, and how they affect the movement of molecules. Rishi is a pediatric infectious disease physician and works at Khan Academy.\n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "image_url": "https://img.youtube.com/vi/hSkIG4MdKqU/hqdefault.jpg", "youtube_id": "hSkIG4MdKqU", "position": 5, "content_kind": "Video", "readable_id": "three-types-of-capillaries"}, {"translated_youtube_id": "yeX0uDpPBj4", "relative_url": "/video/pre-capillary-sphincters", "has_questions": false, "keywords": "", "ka_url": "http://www.KhanAcademy.org/video/pre-capillary-sphincters", "duration": 260, "translated_title": "Pre-capillary sphincters", "translated_description_html": "Find out how the body controls how much blood flows through a capillary bed. Rishi is a pediatric infectious disease physician and works at Khan Academy.\n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "id": "x02c66e8b", "description_html": "Find out how the body controls how much blood flows through a capillary bed. Rishi is a pediatric infectious disease physician and works at Khan Academy.\n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "title": "Pre-capillary sphincters", "progress_key": "vx02c66e8b", "edit_slug": "edit/v/x02c66e8b", "author_names": ["Rishi Desai"], "deleted_mod_time": "2013-07-13T00:03:08Z", "description": "Find out how the body controls how much blood flows through a capillary bed. Rishi is a pediatric infectious disease physician and works at Khan Academy.\n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "extra_properties": {"original_url": ""}, "node_slug": "v/pre-capillary-sphincters", "deleted": false, "backup_timestamp": "2013-09-23T10:33:41Z", "date_added": "2013-03-20T23:40:30Z", "download_urls": {"mp4": "http://s3.amazonaws.com/KA-youtube-converted/yeX0uDpPBj4.mp4/yeX0uDpPBj4.mp4", "png": "http://s3.amazonaws.com/KA-youtube-converted/yeX0uDpPBj4.mp4/yeX0uDpPBj4.png", "m3u8": "http://s3.amazonaws.com/KA-youtube-converted/yeX0uDpPBj4.m3u8/yeX0uDpPBj4.m3u8"}, "translated_youtube_lang": "en", "kind": "Video", "url": "http://www.youtube.com/watch?v=yeX0uDpPBj4&feature=youtube_gdata_player", "ka_user_license": "cc-by-nc-sa", "global_id": "vx02c66e8b", "sha": "e600d0ee6fdd039ed6578b1cc6bb3c51ce5cb6fe", "translated_description": "Find out how the body controls how much blood flows through a capillary bed. Rishi is a pediatric infectious disease physician and works at Khan Academy.\n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "image_url": "https://img.youtube.com/vi/yeX0uDpPBj4/hqdefault.jpg", "youtube_id": "yeX0uDpPBj4", "position": 6, "content_kind": "Video", "readable_id": "pre-capillary-sphincters"}]