https://www.khanacademy.org/science/biology/human-biology/muscles/v/anatomy-of-a-muscle-cell 2021-03-18T10:33:24Z Anatomy of a skeletal muscle fiber Understanding the structure of a muscle fiber. Sal Khan video https://cdn.kastatic.org/googleusercontent/S6BXMWgU6CH7LWEVXSaJu156NUNUl175R4ZEeLlo7ODD3eVRH-WsmMkx92eRSNpbe5ZA8iOH8p59iUqwTODDjBis3g Anatomy of a skeletal muscle fiber Understanding the structure of a muscle fiber. https://cdn.kastatic.org/ka-youtube-converted/uY2ZOsCnXIA.mp4/uY2ZOsCnXIA.mp4 992 Locomotion and Movement https://www.khanacademy.org/science/biology/human-biology/muscles/v/myosin-and-actin 2023-08-17T23:33:36.770424498Z Myosin and actin Learn how proteins, specifically myosin and actin, use ATP to produce movement in muscles. Understand the role of ATP hydrolysis in this process. This is a key part of how muscles function, converting chemical energy into mechanical energy. Sal Khan video https://cdn.kastatic.org/googleusercontent/AKtqMjGoiPkhBkdAnrvWSAUmIbq2xqa_d308rE_2FVziSzqpMECGIg1UGRHAKKumujQmleKzRKljna1cUFO-d85WRQ Myosin and actin Learn how proteins, specifically myosin and actin, use ATP to produce movement in muscles. Understand the role of ATP hydrolysis in this process. This is a key part of how muscles function, converting chemical energy into mechanical energy. https://cdn.kastatic.org/ka-youtube-converted/zopoN2i7ALQ.mp4/zopoN2i7ALQ.mp4 578 Locomotion and Movement https://www.khanacademy.org/science/up-biology-grade-11-revision-course-full-term/x01ceb15d0be61009:week-3/x01ceb15d0be61009:untitled-613/v/muscle-contraction-crossbridge-cycle 2025-01-03T04:48:12.342642736Z Muscle Contraction (Crossbridge Cycle) I like to move it move it..I like to move it move it..We like to move it.. But how? How do our muscles work to allow movement? What proteins are involved in this? Watch this video to understand more about muscle contraction and the crossbridge cycle. Nivedhitha Suresh video https://cdn.kastatic.org/ka_thumbnails_cache/31934293-5e14-4bfe-8cbc-c36d9f8142ed_1280_720_base.png Muscle Contraction (Crossbridge Cycle) I like to move it move it..I like to move it move it..We like to move it.. But how? How do our muscles work to allow movement? What proteins are involved in this? Watch this video to understand more about muscle contraction and the crossbridge cycle. https://cdn.kastatic.org/ka-youtube-converted/AVZTlnHNbOU.mp4/AVZTlnHNbOU.mp4 604 Locomotion and Movement https://www.khanacademy.org/science/up-biology-grade-11-revision-course-full-term/x01ceb15d0be61009:week-3/x01ceb15d0be61009:untitled-613/e/skeletal-muscle-fiber 2026-04-08T00:36:09.500768563Z Skeletal muscle fiber This exercise tests your knowledge of the anatomy of skeletal muscles, the structure of actin and myosin, and the mechanism of muscle contraction. Moumita Sen exercise https://www.khanacademy.org/science/up-biology-grade-11-revision-course-full-term/x01ceb15d0be61009:week-3/x01ceb15d0be61009:untitled-613/v/axial-skeleton 2023-05-09T21:01:11.605979523Z Axial skeleton This video takes you through the different bones in the skull, vertebral column, and rib cage. Moumita Sen video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Axial skeleton This video takes you through the different bones in the skull, vertebral column, and rib cage. https://cdn.kastatic.org/ka-youtube-converted/zHZcPXmk71M.mp4/zHZcPXmk71M.mp4 560 Locomotion and Movement https://www.khanacademy.org/science/up-biology-grade-11-revision-course-full-term/x01ceb15d0be61009:week-3/x01ceb15d0be61009:untitled-613/v/appendicular-skeleton 2023-05-11T09:01:05.270349961Z Appendicular skeleton Let's look at the bones constituting our limbs. Moumita Sen video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Appendicular skeleton Let's look at the bones constituting our limbs. https://cdn.kastatic.org/ka-youtube-converted/XfRIFODgSY0.mp4/XfRIFODgSY0.mp4 572 Locomotion and Movement https://www.khanacademy.org/science/up-biology-grade-11-revision-course-full-term/x01ceb15d0be61009:week-3/x01ceb15d0be61009:untitled-613/e/skeleton 2026-04-08T01:15:04.085520103Z Skeleton The exercise is on the structure of the skeleton and its functions. Moumita Sen exercise https://www.khanacademy.org/science/health-and-medicine/advanced-muscular-system/skeletal-system-introduction/v/ligaments-tendons-and-joints 2023-09-10T17:11:17.624018169Z Ligaments, tendons, and joints Ligaments and tendons, strong connective tissues, link bones and muscles. Bones meet at joints, which come in three types: synarthroses (immovable, like in the skull), amphiarthroses (slightly movable, like vertebral joints), and synovial joints (highly movable, like shoulders and hips). Synovial joints are lubricated by synovial fluid and lined by articular cartilage. Overuse can lead to arthritis, causing pain and stiffness. Tracy Kim Kovach video https://cdn.kastatic.org/googleusercontent/P15q_jjISbUPZZYvhOWkN9iREKHIaAU8Xqsb42MHJDGJcjLkk5FNPU_taTYE7RP-ZBJ4HxSSasQpZSjsz4GYzqvN Ligaments, tendons, and joints Ligaments and tendons, strong connective tissues, link bones and muscles. Bones meet at joints, which come in three types: synarthroses (immovable, like in the skull), amphiarthroses (slightly movable, like vertebral joints), and synovial joints (highly movable, like shoulders and hips). Synovial joints are lubricated by synovial fluid and lined by articular cartilage. Overuse can lead to arthritis, causing pain and stiffness. https://cdn.kastatic.org/ka-youtube-converted/frvv37WJjm4.mp4/frvv37WJjm4.mp4 167 Locomotion and Movement https://www.khanacademy.org/science/up-biology-grade-11-revision-course-full-term/x01ceb15d0be61009:week-3/x01ceb15d0be61009:untitled-613/v/musculoskeletal-system-disorders 2023-05-16T11:42:45.366417523Z Musculoskeletal system disorders In this video, we describe diseases of the muscular system and the skeletal system, like myasthenia gravis and arthritis. Moumita Sen video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Musculoskeletal system disorders In this video, we describe diseases of the muscular system and the skeletal system, like myasthenia gravis and arthritis. https://cdn.kastatic.org/ka-youtube-converted/nnqTVu9-59E.mp4/nnqTVu9-59E.mp4 827 Locomotion and Movement https://www.khanacademy.org/science/up-biology-grade-11-revision-course-full-term/x01ceb15d0be61009:week-3/x01ceb15d0be61009:untitled-613/e/joints-and-musculoskeletal-system-disorders 2026-04-07T23:55:07.30621384Z Joints and musculoskeletal system disorders This exercise is on the types of joints; and the diseases myasthenia gravis, muscular dystrophy, tetany, arthritis, osteoporosis, and gout. Moumita Sen exercise