Histology 3 Hard Connective Tissue By Dr Mohamed

• Histology 3 - Hard Connective Tissue By Dr. Mohamed Nagui Tawfik Associate Prof. Of Histochemistry & Cell Biology department Faculty of Science UNIVERSITY of BISHA 2017 15/04/42 1

Cartilage • The cell (chondrocytes) lies in small chambers called lacunae • Matrix is solid yet flexible • Lacks direct blood supply, as a result, it heals slowly 11/30/2020 2

• 3 types - Hyaline cartilage - Elastic cartilage - Fibrocartilage 11/30/2020 3

A. Hyaline Cartilage • Most common • Matrix contains fine collagenous fibers – Glassy, white, opaque • Found in the nose, ends of the long bones and ribs, rings in the trachea 11/30/2020 4

B. Elastic Cartilage • Contains elastic and collagenous fibers • Found in the outer ear 11/30/2020 5

C. Fibrocartilage • Matrix contains strong collagenous fibers • Function: absorbs shocks and reduces friction between joints • Found in the pads between the vertebrae and knee joints 11/30/2020 6

. 3 Bones • Most rigid of the connective tissues • Minerals and protein fibers gives bone rigidity, elasticity and strength • Two types: – Compact bone – Spongy bone 11/30/2020 7

A. Compact Bone • Found in the outer portion of long bones • Consists of many cylindrical-shaped units called osteon 11/30/2020 8

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B. Spongy Bone • Found on ends of long bone • Contains bony bars and plates called trabeculae separated by irregular spaces • Blood cells are made within the red marrow found in the spongy bone 11/30/2020 10

Thank You 15/04/42 11