@anitacheung83

6 years ago

Types of connective tissue Proper connective tissue (most diverse) • Loose (e.g. skin) a lot of ground substances, fewer fibres, more cells and elastic fibre helps go back into shape, collagen helps anchor (stable) it (won't snap) ◦ Areolar (the most common) ‣ Find under epithelial tissue and around organs ‣ Random arrangement of fibres, a few fibroblast cells ‣ Holds at water ◦ Reticular ‣ Mostly made up of reticular fibres ‣ Find in lymph node bone marrow, and supports developing blood cells ‣ Hold blood in place ◦ Adipose (fat tissue) ‣ Mostly cells ‣ Store lipids, insulate the body against heat loss • Dense (e.g. tendon, ligament) a lot of collagen, great resistance to tension ◦ Regular ◦ Irregular ‣ Thicker fibers ‣ collagen fibres arranged irregularly ‣ Fibroblasts ‣ Found in places that exert tension in a lot of direction ‣ E.g. dermis under our skin ◦ Elastic ‣ Find in Joint ‣ made of elastic fibres ‣ E.g. connecting vertebrae, some largest artery wall ‣ Provides support and flexibility Cartilage connective tissue (White) • Hyaline (the most common type) ◦ Chondrocytes and lacunae ◦ Glassy and transparent ◦ Ground substance, proteoglycans, collagen fibres(just a little bit) ◦ Provide pliable support ◦ E.g. the connection between sternum and ribs ◦ E.g. Nose Bridge • Elastic ◦ Chondrocytes, elastic fibers ◦ Provide strength and stretchability • Fibro ◦ Chondrocyte, thick fibres of collagen ◦ Shockes absorber, standing pressure ◦ E.g. Disc between your vertebrae, knee joint Bone connective tissue (osseous tissue) • Spongy ◦ Strong, porous ◦ Internal layers of bone ◦ Uses porous to make and store bone marrow ◦ E.g. flat bones like sternum • Compact ◦ External layers of your bones ◦ Store calcium Blood Connective tissue (no fibre, but a lot of protein) • Plasma ◦ Ground substance and protein fibres • Erythrocytes (red blood cells) • Leukocytes (White blood cells) • Platelets

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