L2- Types of tissues Flashcards
four broad classifications of tissue
epithelial
connective
muscle
nerve
epithelial tissue
continuous sheets of cells that cover the external surface and line internal surfaces of the body
epithelial cells are …… when at surfaces
polarised
what does polarisation mean in regards to epithelial tissue
o Always have a basement membrane on the basal (lower surface)
o Often secrete something from apical surfaces (top)
o Lateral (side)
epithelia cells are held together via
strong anchoring proteins
epithelial cells communicate through
gap junctions at their lateral and basal surfaces
nervous tissue includes
nerve cells (neurones) and support cells
support cells in nervous tissue
oligodendrocytes, astrocytes, ependymal cells, Schwann cells, microglia, and satellite cells
longest nerve
sciatic
nervous tissue proves the
fast communication system in the body
nerve cells congregate into
nerve fibres–> nerves
muscle tissue (3)
skeletal
cardiac
smooth
major function of muscle
- Movement
- Stability
- Movement of tissue contents
minor function of muscle
to secrete hormones
- Natriuretic factors
- Myostatin
Natriuretic factors
o Acts on kidney to control water balance
