https://www.khanacademy.org/science/health-and-medicine/human-anatomy-and-physiology/introduction-to-muscles/v/skeletal-structure-and-function 2023-04-19T21:14:29.759927248Z Skeletal structure and function Skeletons support and protect our bodies. Bugs have exoskeletons outside their bodies, while humans have endoskeletons inside. Our bones are in axial (skull, ribcage, spine) and appendicular (arms, legs) groups. Bone marrow makes blood cells; more specifically, red marrow makes blood and yellow marrow stores fat. Tracy Kim Kovach video https://cdn.kastatic.org/googleusercontent/ypFNLxH6J7sJUvZtLl-Xa3LesXzxYsvYWYJFzEksUPmibF5gyJQQFjMG8_zvKdp8i8FQFtGOmYFxfZx9UPsrS8DT Skeletal structure and function Skeletons support and protect our bodies. Bugs have exoskeletons outside their bodies, while humans have endoskeletons inside. Our bones are in axial (skull, ribcage, spine) and appendicular (arms, legs) groups. Bone marrow makes blood cells; more specifically, red marrow makes blood and yellow marrow stores fat. https://cdn.kastatic.org/ka-youtube-converted/-lrKDRAbP38.mp4/-lrKDRAbP38.mp4 412 Structure and composition of the skeletal system https://www.khanacademy.org/science/up-science-grade-6-revision-course-full-term/x017c12e57b64cfa8:week-2/x017c12e57b64cfa8:untitled-229/e/functions-of-joints-and-cartilages 2026-04-07T23:36:17.218592739Z Functions of joints and cartilages LO: Functions of joints and cartilages Revathi exercise https://www.khanacademy.org/science/health-and-medicine/human-anatomy-and-physiology/introduction-to-muscles/v/microscopic-structure-of-bone-haversian-system 2023-08-17T23:33:36.770424498Z Microscopic structure of bone - the Haversian system In this video we will explore the microscopic structure of bone or the Harvesian system in depth. Discover the difference between spongy and compact bone, learn about the function of osteons, and delve into the role of haversian canals, lacunae, and volkmann canals in bone health. Tracy Kim Kovach video https://cdn.kastatic.org/googleusercontent/EVZSxhepXQPTkCvYRR5Bnz27pP7PDtzhTzdZbg6XPehaVRlyjDNRK1EHf66PiwA2NFEIKJ1fW6RhEooCK6BwRd4 Microscopic structure of bone - the Haversian system In this video we will explore the microscopic structure of bone or the Harvesian system in depth. Discover the difference between spongy and compact bone, learn about the function of osteons, and delve into the role of haversian canals, lacunae, and volkmann canals in bone health. https://cdn.kastatic.org/ka-youtube-converted/IKHVpABUSDs.mp4/IKHVpABUSDs.mp4 249 Structure and composition of the skeletal system https://www.khanacademy.org/science/grade-12-biology-snc-aligned/xa8ba3a087f1f5288:human-physiology/xa8ba3a087f1f5288:structure-and-composition-of-the-skeletal-system/e/bone-animal-tissues 2026-04-08T00:54:09.631945657Z Bone - Animal Tissues Students will learn bone composition, cell types, classifications, and compact/spongy structure; the exercise tests their ability to explain function, ageing effects, repair, and clinical implications. Khan Academy exercise https://www.khanacademy.org/science/health-and-medicine/advanced-muscular-system/skeletal-system-introduction/v/cartilage 2023-09-10T17:11:17.624018169Z Cartilage Cartilage, a connective tissue, is secreted by chondrocytes and composed of collagen and elastin, providing strength and flexibility. It lacks nerve cells and blood vessels, gaining nutrition from surrounding fluid. There are three types: hyaline cartilage, found in the larynx, trachea, and joints, reduces friction and absorbs shock; elastic cartilage, found in the outer ear and epiglottis, provides shape and support; fibrous cartilage, found in the spine and pelvic bones, offers rigidity and shock absorption. Tracy Kim Kovach video https://cdn.kastatic.org/googleusercontent/Zm_jsVttkad0puPaAZHM4pkKfPlM8uiVrJnmP_V5gckpJcm8kQ6JLYeCKBvV7ymmBIzwA7Swr7U1omxsjIDV3tD9Ow Cartilage Cartilage, a connective tissue, is secreted by chondrocytes and composed of collagen and elastin, providing strength and flexibility. It lacks nerve cells and blood vessels, gaining nutrition from surrounding fluid. There are three types: hyaline cartilage, found in the larynx, trachea, and joints, reduces friction and absorbs shock; elastic cartilage, found in the outer ear and epiglottis, provides shape and support; fibrous cartilage, found in the spine and pelvic bones, offers rigidity and shock absorption. https://cdn.kastatic.org/ka-youtube-converted/N3g3poXeqaY.mp4/N3g3poXeqaY.mp4 219 Structure and composition of the skeletal system https://www.khanacademy.org/science/health-and-medicine/advanced-muscular-system/skeletal-system-introduction/v/skeletal-endocrine-control 2023-08-17T23:33:36.770424498Z Skeletal endocrine control Uncover the pivotal role of the skeletal system in our body, from offering structure to facilitating motion. Learn how bones, cartilage, and ligaments synergize, and investigate the minute structure of bone. Delve into the endocrine regulation of the skeletal system and its significance for overall wellness. Tracy Kim Kovach video https://cdn.kastatic.org/googleusercontent/woBpIViMO_vSssamtlFcjGkMOivaa_WieNcROP4yFRKiseFDiRnHUeK1S754pDgT1N1byI3yaxgIWpLe1zNqd8GG Skeletal endocrine control Uncover the pivotal role of the skeletal system in our body, from offering structure to facilitating motion. Learn how bones, cartilage, and ligaments synergize, and investigate the minute structure of bone. Delve into the endocrine regulation of the skeletal system and its significance for overall wellness. https://cdn.kastatic.org/ka-youtube-converted/csp08ICfOC4.mp4/csp08ICfOC4.mp4 502 Structure and composition of the skeletal system https://www.khanacademy.org/science/health-and-medicine/advanced-muscular-system/skeletal-system-introduction/v/cellular-structure-of-bone 2023-08-17T23:33:36.770424498Z Cellular structure of bone Explore the cellular structure of bone, including the bone matrix and the cells that form it. Understand the organic and inorganic components of the bone matrix - osteoid and hydroxyapatite. Learn about the four types of cells in bone: osteoprogenitor cells, osteoblasts, osteocytes, and osteoclasts. Discover how these cells contribute to bone formation and remodeling. Tracy Kim Kovach video https://cdn.kastatic.org/googleusercontent/eq_Li8X6kr4mHfcte5Q1j3LIIIyravA7LhKEFdbF732D7UwX9JHaik7n4q8NEBETVduZ56Qj3tWwNdFvNcoKUa3Y Cellular structure of bone Explore the cellular structure of bone, including the bone matrix and the cells that form it. Understand the organic and inorganic components of the bone matrix - osteoid and hydroxyapatite. Learn about the four types of cells in bone: osteoprogenitor cells, osteoblasts, osteocytes, and osteoclasts. Discover how these cells contribute to bone formation and remodeling. https://cdn.kastatic.org/ka-youtube-converted/q1LlWexoKks.mp4/q1LlWexoKks.mp4 428 Structure and composition of the skeletal system https://www.khanacademy.org/science/grade-12-biology-snc-aligned/xa8ba3a087f1f5288:human-physiology/xa8ba3a087f1f5288:structure-and-composition-of-the-skeletal-system/e/skeletal-system---passage-2 2026-04-08T00:54:09.631945657Z Skeletal system: Bone development Skeletal System - Passage 2 Alicia Cutillo exercise https://www.khanacademy.org/science/hs-bio/x230b3ff252126bb6:from-cells-to-organisms/x230b3ff252126bb6:human-body-systems/a/hs-the-musculoskeletal-system-review 2024-05-06T19:22:43.24334365Z The musculoskeletal system review Learn about the organs and functions of the musculoskeletal system. article