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83 terms

tissue

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define tissue
groups of cells with similar functions
define cytology
the study of cells
define histology
the study of tissue
4 types of tissue
connective, epithelial, muscular, nervous.
epithelial tissue
covers,lines, is glandular. anchored by connective tissue.
3 types of epithelial tissue
squamous, cuboidal, columnar
shape: squamos epithelial
thin and flat
shape: cuboidal epithelial
cube shaped
shape: columnar epithelial
column/rectangle shaped
simple epithelial
one layer
stratified epithelial
two or more layers
pseudostratified epithelial
falsely layered "one layer"
Stratified cuboidal
many layers of cube shaped cells, found in glands
Stratified cuboidal found in
glands
pseudostratified columnar found in
upper respiratory tract
Stratified squamous
many layers of thin flat cells
Dry (keratinized) stratified squamous found in
epidermis of skin
Wet (non-keratinized) stratified squamous found in
mouth, vagina, rectum
Stratified columnar
many layers of column shaped cells
stratified columnar found in
male urethra
transitional epithelium
the only epithelium that can stretch
transitional epithelium found in
urinary bladder
3 junctions between epithelial cells
tight, gap, demosome
tight junction
impermeable connection between adjacent cells
gap junction
tubular protein that connects adjacent cells
demosome
stitch between adjacent cell membranes, helps cells resist mechanical stress
hemi-demosome
half-stitch that connects the basil surface of the epithelium to the basement membrane
Connective tissue function
connects or binds things
connective tissue components
cells, matrix, ground substance, fibers
connective tissue: cells
secrete matrix
connective tissue: matrix
consists of ground susbstance
connective tissue: ground substance
solid, liquid or semi-solid
connective tissue: fibers
suspended in the ground substance (collagen)
Types of connective tissue
fibrous, supportive, fluid
types of fibrous connective tissue
dense and loose
Dense fibrous CT
fibers densely packed in the tissue
Dense fibrous CT found in
tendons, ligaments, dermis of the skin
Loose fibrous CT
fibers loosely packed
loose fibrous CT found in
adipose (fat), areolar tissue
types of supportive CT
cartilage, bone, cells
Types of cartilage supportive ct
Hyaline, fibrocartilage, elastic
Hyaline cartilage
most common, strong and flexible
hyaline cartilage found in
embryonic skeleton, joins
fibrocartilage
strong, not flexible
fibrocartilage found in
intervertebral disks, pubic symphysis, menisci
elastic cartilage
flexible but not strong
elastic cartilage found in
pinna of the ear
Cartilage cells
chondrocytes
Types of bone
spongy, compact
spongy bone
filled with large open spaces
compact bone
appears solid, but has tiny holes
3 types of bone cells
osteocyte, osteoblast, osteoclast
osteocyte
mature bone cell
osteoblast
bone building cell
osteoclast
bone destroying cell
2 types Fluid connective tissue
blood, lymph
2 things in blood
matrix, cells
blood matrix
plasma (mostly water)
types of cells in blood
red, white, platelets
red blood cells
carry oxygen
white blood cells
fight infection
platelets
clotting cells
Lymph fluid
blood derivative
Muscle Tissue function
contraction
types of muscle
skeletal, cardiac, smooth
skeletal muscle location
attaches to bone
skeletal muscle cell shape and appearance
long & cylindrical, striated or striped
Skeletal muscle control
what muscle control is voluntary?
skeletal muscle nuclei and reproduction
multi and amitotic (cannot divide)
cardiac muscle location
heart
cardiac muscle cell shape and appearance
branched, striated/striped
cardiac muscle control
involuntary
cardiac muscle nuclei and reproduction
usually uni-nucleate, amitotic (cannot divide)
Smooth muscle location
walls of hollow organs and blood vessels
smooth muscle cell shape and appearance
spindle shaped, non-striated
smooth muscle control
involuntary
smooth muscle nuclei and reproduction
ini-nucleate, can reproduce
Nervous tissue function
control body functions
nervous tissue cell types
neuron, neuroglia
neuron
main cell type of NT
neuroglia
support neurons, AKA glial cells
types of neuroglia
microglial, ependymal, oligodendrocytes, astrocytes, schwann cells
Body membranes are
found lining body surfaces