histology:study of tissues Flashcards
tissue
collection of cells that perform specific functions
epithelial tissue
•found throughout body inside and out
•main glandular tissue secretion
•cells laid out in sheets w strong connections/attachments
•tightly packed cells
•attached to underlying connective tissue by non cellular, nonliving basement membranes
•usually avascular (no blood supply)
cells reproduce quickly (diffusion of nutrients, rapid healing)
function of epithelial tissue
protect,secrete absorb, excrete, sensory perception
parenchyma (the actual cells)
the tissue that performs the epithelial organ function
stroma
the tissue that supports the organs function
lumen (light)
outside of the cell network. typically exposed to world around it
basement membrane
thin, fibrous, extra cellular matrix of tissue that separates the lining of an internal or external body surface from underlying connective tissue
squamos
flat
cuboidal
square
columnar
rectangular
simple
single
stratified
multiple
- simple squamos (tissues)
single layer of flattened cells
function:diffusion and filtration
found in air sacs of the lungs,walls of capillaries
- simple cuboidal (tissues)
single layer, cube-shaped cells
function:secretion and absorption
found in:lining of kidney tubules, ducts/glands, covering surface of ovaries
*simple columnar (tissues)
single later, elongated cells with their nuclei in the same position (usually near the basement membrane)
function: secretion and absorption
found in lining of digestive tract and uterus
contains scatter goblet cells functioning in the secretion of mucus ( keeps cells from drying out)
microvilli (simple columnar)
tiny finger-like processes from their free surface- increases surface for absorption
cilia (simple columnar)
help with movement of particles
connective tissue
• most abundant tissue in the body, found throughout every system
• binds structures together
• provides support, protection, framework, fills space, stores fat, produces blood cells, fights infection, and helps repair tissue
•composed of more scattered cells with abundant intracellular and extracellular material (matrix)
•made up of a ground substance(fluid, semi-solid) and fibers
•most had a good blood supply
•cells reproduce over various time frames ( quick to basically never)