Wk3- Connective Tissue
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Functions Connective tissue: • Connecting: bind different tissues together, anchor o? and tissues in places • Support: b- and c- • Protection: b-, c-, v- fat, hosts immune elements • Transport: blood supply
• organs • Bones and cartilage • Bone cartilage visceral fat
All connective tissue contained specialised cells, ECM (- ) , protein fibres and ground s- ( viscous sugar lubricant and s- a-)
Extra cellular matrix Substance shock absorber
Extra cellular fibres and function: What are the 3 fibres? • Co? • El? • Ret?
• Collagen • Elastic • Reticular
Extra cellular fibres and functions: Collagen fibres: S-, long, straight, run down same axis (- directional) found in dense c- tissue (in t- and ligaments
Strong, uni directional, connective , tendons
Extra cellular fibres and functions: Elastic fibres: Elastic bands s- and r- , found in d- regular elastic tissue ( aorta in the heart contracts and pumps)
Stretch and recoil dense
Extra cellular fibres and function: Reticular fibres: Thin in? supports found in reticular tissue l? nodes
Interwoven ,lymph
What are the 6 key cells? • F- (large , mobile, produce fibres, secrete matrix fibres and ground substance components) • M- (large, mobile, immune cells that engulf and destroy pathogens) • P- cells ( immune cells, produce and secrete antibodies) • M- cells (release histamine/ promote inflammation) • A- (fat cells, storage of lipids) • L- (white blood cells/ immune cells)
• Fibroblasts • Macrophages • Plasma cells • Mast cells • Adipose • Leukocytes
Connective tissue can be classified into 2 categories: • Connective tissue p- • S- connective tissue
• Proper 2. Specialised
Specialised connective tissue is ; C- Bl- Bo-
Cartilage Blood Bone
Specialised connective tissue: Cartilage is avascular and can be divided into 3 subgroups H- (smooth, glassy appearance, tightly packed collagen fibres, found in the - tip) E- ( flexible, collagen and elastic fibres ,light weight support found in the outer -) F- (dense and tough, strongest collagen fibres, separates -)
Hyaline : nose tip Elastic: outer ear Fibrocartilage: separates vertebrae
Connective tissue proper: What are the 4 categories of connective tissue? • Lo? connective tissue • D- connective tissue • Re? tissue • Ad? tissue
• Loose • Dense • Reticular • Adipose
Connective tissue proper: • Loose connective tissue : sub c- layer, permits s-
Cutaneous, stretch
Connective tissue proper: • Dense connective tissue There are 3 sub categories of dense connective tissue • Dense regular c- (uni directional , very strong) • Dense regular e- (permits stretch of organ) • Dense i- (multidirectional, resistant to tension stress)
• Collagen • Elastic • Irregular
Connective tissue proper: • Reticular tissue: Reticular fibres s? other structures by providing a network for ly? vessels
Support Lymphatic
Connective tissue proper: • Adipose tissue: L- , energy storage , insulation, protection , shock absorber
Lipids