Connective Tissue Flashcards
what types of cells to connective tissue contain
fibroblasts - produce fibres
adipocytes - fat cell
macrophage - immune system
extracellular material connective tissue contains
3 fibres - collagen, reticular, elastic
collagen fibre
strong and rope like adding strength
reticular fibre
smaller and narrower fibre but branched used for keeping organs in correct 3D structure
elastic fibre
thinner, stretchier allowing changing shape
what is ground substance
cells which produce fibres sit in ground substance eg fluid (blood), gel (cartilage) or mineral (bone)
what did connective tissue develop from
differentiated from mesenchymal stem cells
loose adipose connective tissue
contains fat cells for padding and insulation deep in the skin eg breasts
loose reticular connective tissue
made with many reticular fibres supporting 3D framework eg liver, kidney and bones
dense regular connective tissue
many collagen fibres align parallel in tendons and ligaments to provide firm attachment and stabilise forces
dense irregular connective tissue
collagen fibre line in different directions and may form sheets (capsule) to resist forces applied in different directions and prevent over expansion eg bladder
dense elastic connective tissue
allow expansion and contraction to produce movement eg between vertebrae to stabilise and cushion shock
hyaline cartilage connective tissue description
jelly matrix reinforced by collagen fibres with lacuna of chondrocytes located on bone surfaces and between ribs and sternum
hyaline cartilage connective tissue function
producing stiff but flexible support and reduce friction
elastic cartilage connective tissue description
similar to hyaline but contains elastic tissue not collagen eg ear