anatomy ch 4 lecture Flashcards
what are the four basic tissue types
epithelial
connective
muscle
nervous
epithelial tissues
sheet of cells that covers body surfaces or cavities
covering and lining epithelia
on external and internal surfaces
characteristics of epithelial tissues
polarity
specialized contacts
supported by connective tissues
avascular but innervated
regeneration
two main forms of epithelial tissue
covering and lining epithelia
glandular epithelia
main functions of epithelial tissues
protection
absorption
filtration
excretion
secretion
sensory reception
glandular epithelia
secretory tissue in glands
apical surface
upper free side, exposed to surface or cavities
basal surface
lower attached side, faces inwards toward body
attaches to basal lamina
T/F: all epithelial sheets are supported by connective tissue
true
are blood vessels found in the epithelial tissue
no
T/F: epithelial tissues are named after apical surface
true
simple epithelia
single layer thick
stratified epithelia
2+ layers thick
squamous
flattened and scale like
cuboidal
box like, cube
columbar
tall, column like
simple squamous function
allow materials to pass by
simple cuboidal function
secretion and absorption
simple columnar function
absorption, secretion of mucus, enzymes
pseudostratified columnar epithelium
appears to be multilayered, but is singer layered
secretes substances (particularly mucus)
stratified squamous
thick
protects underlying tissues
transitional epithelium
basal cells cuboidal or columnar, surface cells dome shaped/squamous like
stretches readily
endocrine gland
internally secreting
no ducts
hormones
exocrine gland
externally secreting
ducts
sweat
T/F: exocrine glands can be unicellular or multicellular
true
examples of unicellular exocrine glands
mucous cells
goblet cells
both produce mucin
multicellular glands
composed of duct and secretory unit
surrounded by connective tissues
classified by structure and mode of secretion
simple exocrine glands
unbranched ducts
compound exocrine glands
branched ducts
tubular exocrine gland
secretory cells form a duct
alveolar exocrine gland
secretory cells form sacs
merocrine glands
secrete products by exocytosis as secretions are produced
sweat
pancreas
holocrine glands
accumulate products within, then rupture
sebaceous oil glands
apocrine glands
accumulate products within, but only apex ruptures
four main classes of connective tissues
connective tissue proper
cartilage
bone
blood
function of connective tissues
binding and support
protecting
insulating
storing reserve fuel
transporting substances (blood)
three main elements of connective tissues
ground substance
fibers
cells
ground substance
fills space between cells
interstitial fluid
cell adhesion proteins
proteoglycans
water
three types of connective tissue fibers
collagen
elastic fibers
reticular
where are fibroblasts found
connective tissue proper
where are chondroblasts found
cartilage
where are osteoblasts found
bone
function of fat cells
store nutrients
function of white blood cells
tissue response to injury
function of mast cells
initiate local inflammatory response against foreign microorganisms they detect
function of macrophages
phagocytic cells that eat dead cells
connective tissue proper consists of all connective tissues EXCEPT
bone, cartilage, blood
CT proper: loose connective tissues
areolar
adipose
reticular
CT proper: dense connective tissues
dense regular
dense irregular
elastic
cartilage
matrix secreted from chondroblasts and chondrocytes
80% water, with packed collagen fibers and sugar proteins
lacks nerves
avasuclar
what are the three types of cartilage
hyaline
elastic
fibrocartilage
hyaline cartilage
most abundant
tip of nose
elastic cartilage
more elastic fibers
ears, epiglottis
fibrocartilage
strong!!
found in high impact areas
osseous tissue
bone
osteocytes
VERY vascularized
three types of muscle tissue
skeletal
cardiac
smooth
skeletal muscle
attached and causes movement of bones
VOLUNTARY
muscle fibers
striated
cardiac muscles
heart
INVOLUNTARY
smooth muscle
in walls of hollow organs
INVOLUNTARY
no visible striations
spindle shaped
what are the three types of covering and lining membranes
cutaneous
mucous
serous
cutaneous membrane
skin
dry membrane
mucous membrane
lines body cavities that are open to the exterior
digestive, respiratory, urogenital
serous membrane
aka serosae
found in closed ventral body cavities