connective tissue
暂无描述。系统推荐的高质量记忆内容,适合每天坚持背诵学习。
卡片预览 (24 张)
what are the components of CT
Cells and extracellular matrix
what are the function of the CT
Support stuctural Defense and protection Act as a transport medium
whar are fixed cells
these are stable cells that remain in the ct where they perform their specific function. They live a long time
give 2 examples of fixed cells
fibroblasts and mesenchymal cells
what are transcient cells
these are cells that move around in the bloodstream. they do not live long and are derived from bone marrow.
give 3 examples of transient cells
plasma cells, lymphocytes and macrophages
describe mesenchyme cells
these are a fixed type of cellin CT They are most abundant in embryonic tissue developing they differentiate into a variety of disticnt cell types
are fibroblats the main cell type in ct
yes- they product collagen, reticular and elastic fibres and fill in spaces in ct
what are the 2 forms of fibroblasts
active and inactove
what are active fibroblasts
they are found in close association with collagen bundles. They are elongated cells with a pale staining nucleus and a dark nucleus
how are inactive fibroblats differnt to active fibroblats
inactive fibroblast are smaller and have a smaller nucleus and are more elongated
desribe macrophages
Macrophages are a type of white blood cell that play a central role in the immune system. They are a type of transient cell. Macrophages develop from monocytes, a type of white blood cell that circulates in the bloodstream. When monocytes migrate into tissues, they mature into macrophages
what are histicytes
they are a type of macrophage. They digest damaged, dead cells and debris via pahgocytosis with the action of hydrolytic enzymes
whar are mast cells
they are very large cells that are egg shapes and have granular cytoplasm. They producce histamine and heparin. They play a role in the immune system reposne
what do mast cells produce
histamine and heparin
are mast cells fixed or transient cells
Mast cells are fixed (resident) connective tissue cells — they stay put and act as local defenders in allergic and inflammatory reactions.
descibe plasma cells
these are transient cells and are found in regions of chronic inflamation. They are derived from b lymphocyte cells and produce antiboides. Basophilic cytoplasm (rich in rough endoplasmic reticulum for protein synthesis).
what do plasma cells produce
antibodies- to help with immune response/fight infections
what are lekocytes
they are a transient type of cell and they are white blood cells that enter the CT Via the capillaries. Their job is to defend the body against infection, foreign substances, and disease.
what is ground substance
it is a hydrated, amorphous gel-like substance containing GAG’s , glycoproteins and proglycans. They provide a medium for growth and repair and acts as a barrier
what are the types of ground substance
soft and hard
what is the difference between soft and hard ground sybstance
soft is less sulphated than hard. They are both made of GAG’S
where is hard ground substance found
in bone ground sybstance
where is soft ground substance found
in synovial fluid and vitreous humor