unit 1 a&p lecture 7
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28 Terms
connective tissue
comprised of fibroblasts
cartilage
comprised of chondrocytes
bone
comprised of osteocytes
blood
comprised of erythrocytes, leukocytes, & platelets
ground substance
gel-like non-fibrous part of extracellular matrix
collagen molecules
consist of 3 a-chains into a triple helix —> high tensile strength
fibrillar collagen
types I, II, and III; type IV: forms sheet like network in basal lamina
reticular fibers
made of type III collagen to form mesh-like framework (stroma) for flexibility & movement
elastic fibers
make elastin protein & works w collagen to return to normal shape
elastic fibers
make elastin protein & works w collagen to return to original shape
loose connective tissue
contain blood vessels (vascularized) & many collagen and elastic fibers
areolar connective tissue
binds water & supports; found under epithelia & around organs
adipose connective tissue
stores energy as fat in large adipocytes; cushions & protects
reticular connective tissue
stroma/framework; support lymphatic & immune cells
glycosaminoglycans (GAGs)
loose areolar connective tissue that allows nutrients, oxygen, & wastes to diffuse
dense regular connective tissue
found in tendons & ligaments
dense irregular connective tissue
found in dermis & run in diff directions
elastic connective tissue
branching elastic fibers & large arteries
cartilage
firm, avascular connective tissue
hyaline cartilage
found in nose, trachea, b/w ribs & sternum
elastic cartilage
contain abundant elastic fibers found in external ear & parts of larynx
fibrocartilage
thick, collagen fibers found in intervertebral discs & parts of knee joint
bone
connective tissue strengthened by collagen & calcium salts
osteoblast
bone-forming cell that produces new bone matrix
osteocyte
mature bone cell that maintains bone matrix
canaliculi
connect osteocytes & allow nutrients/wastes to move b/w cells and blood supply
lacunae
small spaces in bone matrix
Haversian (central) canal
osteon containing blood vessels