📖 Samacheer Kalvi · 11th TN - English Medium · Bio Zoology · Page 168question

Skeleton · Part 4

Chapter 7: 9 · Bio Zoology

blood vessels. Internal bone surfaces are covered with a delicate connective tissue membrane called the endosteum . The endosteum covers the trabeculae of spongy bone and lines the canals that pass through the compact bone. It also contains both osteoblasts and osteoclasts.

Between the epiphysis and diaphysis epiphyseal plate or growth plate is present. XI Std Biology-Zoology Chapter- Table: . Bones of the Skeletal System Skeleton Name of Bone Number of Bones Total Number of Bones Axial skeleton ( bones) Skull Cranium Facial bone Bones of middle ear ( × ) Hyoid bone Vertebral column Cervical (in adults) Thoracic Lumbar Sacral bones fused to bone Coccyx bones fused to bone Sternum Ribs × = Appendicular skeleton (126bones ) Fore limb Humerus Radius Ulna Carpals Metacarpals Phalanges ( × ) Hind limb Femur Tibia Fibula Tarsal Metatarsals Phalanges Patella (Knee bone) ( × ) Pectoral girdle Scapula Clavicle ( × ) Pelvic girdle Innominate (Ilium, ischium and pubis fused into one bone) ( × ) Total number of bones in adults XI Std Biology-Zoology Chapter- Figure . Structure of a long bone Medullary cavity Compact bone Proximal epiphysis Metaphysis Diaphysis Distal epiphysis Metaphysis

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