https://www.khanacademy.org/science/health-and-medicine/circulatory-system/circulatory-system-introduction/v/meet-the-heart 2024-04-04T15:34:20.714536152Z Meet the heart! The heart, nestled between the lungs and protected by the rib cage, serves as a powerful pump ensuring blood flow throughout the body. This systemic flow delivers oxygen and nutrients to cells and removes waste. Additionally, the heart manages pulmonary flow, sending blood to the lungs for oxygenation before distributing it to the body. Lastly, the heart's own cells are nourished by coronary blood vessels, part of the systemic flow. Rishi Desai video https://cdn.kastatic.org/ka_thumbnails_cache/788d62ac-0d84-48ee-a35f-2b21e850a2b1_1280_720_base.png Meet the heart! The heart, nestled between the lungs and protected by the rib cage, serves as a powerful pump ensuring blood flow throughout the body. This systemic flow delivers oxygen and nutrients to cells and removes waste. Additionally, the heart manages pulmonary flow, sending blood to the lungs for oxygenation before distributing it to the body. Lastly, the heart's own cells are nourished by coronary blood vessels, part of the systemic flow. https://cdn.kastatic.org/ka-youtube-converted/Vi1JK6IYVt8.mp4/Vi1JK6IYVt8.mp4 609 Circulatory system and structure of the heart https://www.khanacademy.org/science/in-in-class-10-biology/in-in-life-processes/in-in-transportation-in-human-beings/e/blood-vessels-and-their-maintenance 2026-03-29T05:22:55.632595123Z Blood vessels and their maintenance An exercise to practice on the types of blood vessels and their maintenance. Saiyem exercise https://www.khanacademy.org/science/hs-bio/x230b3ff252126bb6:from-cells-to-organisms/x230b3ff252126bb6:human-body-systems/a/hs-the-circulatory-system-review 2024-05-06T19:22:43.24334365Z The circulatory system review Learn about the organs and functions of the circulatory system. article https://www.khanacademy.org/science/health-and-medicine/advanced-hematologic-system/hematologic-system-introduction/v/what-s-inside-of-blood 2023-08-17T23:33:36.770424498Z What's inside of blood? Spin down your blood and find out what it's made up of. This video provides a detailed look at the composition of blood, explaining the roles of plasma, white blood cells, and red blood cells. It also discusses the process of centrifugation, the concept of hematocrit, and the conditions of anemia and polycythemia. Rishi is a pediatric infectious disease physician and works at Khan Academy. Rishi Desai video https://cdn.kastatic.org/googleusercontent/A-1JQ6oGIHWTXT5pYt6_ZI2-zh1ZfVg_S4VoGxNizqiNZ04FQk8z9KAtH9fq6EZwXHWkMuzuiVAdtfdoGVN46IWQ What's inside of blood? Spin down your blood and find out what it's made up of. This video provides a detailed look at the composition of blood, explaining the roles of plasma, white blood cells, and red blood cells. It also discusses the process of centrifugation, the concept of hematocrit, and the conditions of anemia and polycythemia. Rishi is a pediatric infectious disease physician and works at Khan Academy. https://cdn.kastatic.org/ka-youtube-converted/5MOn8X-tyFw.mp4/5MOn8X-tyFw.mp4 669 Circulatory system and structure of the heart https://www.khanacademy.org/science/biology/human-biology/circulatory-pulmonary/a/components-of-the-blood 2024-03-27T09:57:43.690871742Z Components of blood The different components that make up blood. Plasma, white blood cells, red blood cells, platelets. article https://www.khanacademy.org/science/health-and-medicine/circulatory-system/circulatory-system-introduction/v/layers-of-the-heart 2022-11-16T04:22:43.7414897Z Parts of the heart The heart's structure and function is complex. Blood flows through the heart in a specific pattern, thanks to valves that keep it moving in the right direction. Certain muscles and cords help keep the valves functioning properly. The heart's two ventricles are separated by the interventricular septum. Heart wall muscle is made up of three layers: the endocardium, myocardium, and pericardium. Rishi Desai video https://cdn.kastatic.org/googleusercontent/VGXyW9a-L6mUrbAL6-4i0D6h8ps71zhk4u9xdzpM2qEuRx5OEzFbo45NFNKvFlMMtHg-Xd6vSEExLfGtnhMUXu7w Parts of the heart The heart's structure and function is complex. Blood flows through the heart in a specific pattern, thanks to valves that keep it moving in the right direction. Certain muscles and cords help keep the valves functioning properly. The heart's two ventricles are separated by the interventricular septum. Heart wall muscle is made up of three layers: the endocardium, myocardium, and pericardium. https://cdn.kastatic.org/ka-youtube-converted/bm65xCS5ivo.mp4/bm65xCS5ivo.mp4 733 Circulatory system and structure of the heart https://www.khanacademy.org/science/health-and-medicine/circulatory-system/circulatory-system-introduction/v/flow-through-the-heart 2020-09-09T23:28:12Z Flow through the heart Learn how blood flows through the heart, and understand the difference between systemic and pulmonary blood flow. Rishi is a pediatric infectious disease physician and works at Khan Academy. Rishi Desai video https://cdn.kastatic.org/googleusercontent/oZ6EhbCXlLF8nqwCrKPR1Z4ftBWhk54hdKa9fGwBCm5IRu2rqouGgpU9MTWst9rAQJyZW_7WHiSxn0aIX6dVYHZr Flow through the heart Learn how blood flows through the heart, and understand the difference between systemic and pulmonary blood flow. Rishi is a pediatric infectious disease physician and works at Khan Academy. https://cdn.kastatic.org/ka-youtube-converted/7XaftdE_h60.mp4/7XaftdE_h60.mp4 471 Circulatory system and structure of the heart