Connective tissue Flashcards
Types of connective tissue?
- loose
- dense (regular and irregular)
- specialised
connective tissue is composed of
- cells
- ECM
what is ECM made of
- ground substance
- fibres
describe ground substance
lubricant, barrier to enemies, pathway
-glycosaminoglycans, proteoglycans, glycoproteins, water, gases, hormones, electrolytes…
what are the 3 fibres
- elastic
- collagen
- reticular
describe collagen
mainly type one
strong and inelastic
-made by fibroblasts
describe elastic fibres
made by fibroblast, SMCs, chondrycytes
with water, enable elasticity
describe reticular
surrounds cells
what are the 5 cells/sub tissues
cartilage bone adipocytes fibroblasts blood
describe blood
specialised connective tissue
describe fibroblasts
make collagen
lots of ER and golgi
describe adipocytes
store triglyceridses
big vesicle with peripherally located nuclei
2 ways bine can form
endochondrial and intramembranous ossification
what doesnt cartilage have
lymph blood nerve
cells of cartilage?
chondrocytes
ecm of cartilage?
proteoglycan gel and collagen
describe hyaline, elastic cartilage and fibrocartilage
hyaline: glass; reticular surfaces of joints; oseophagus and trachea
elastic - cross hatched elastic fibres
fibrocartilage
ECM of bones?
inorganic - CaPO3; organic - collagen
2 types of bone?
compact and spongy/trabecular/cancellous
describe compact bone
outside bones
organised into osteons - 4 concentric lamellae; osteocytes in lacunae
fed via cytoplasmic processes, canaliculi and haversian canal
describe spongy bone
with white blood cells
inside bones
describe bone lining cells
when bone is broken
- diff into
- osteoblasts –> osteiod –> osteocyte
- osteocyte –> eats up/resorbs bone
