Lessons 3-4 Flashcards
four primary types of tissue
nervous, muscle, epithelial, connective
epithelial tissue is made of
mostly cells, little matrix
epithelial tissue is found
on the surfaces of the body, line internal surfaces
which type of tissue is capable of regeneration?
epithelial tissue
squamous epithelial cell shape
flattened and thin
cuboidal epithelial cell shape
boxy, square
rectangular epithelial cell shape
rectangle, taller than width
simple epithelial
one layer of cells
stratified epithelial
more than one layer of cells
pseudostratified epithelial
singular layer of irregularly shaped cells
simple squamous epithelium structure
look like thin scales with elliptical nuclei
simple squamous epithelium function
allow the rapid passage of chemicals
simple squamous epithelium example
on the alveoli of the lungs
stratified squamous epithelium structure
layered scale-like cells
stratified squamous epithelial function
helps with diffusion and filtration
stratified squamous epithelial example
skin
simple cuboidal epithelium structure
box-like with round nuclei
simple cuboidal epithelium function
assist with secretion and absorption
simple cuboidal epithelium example
lining of kidney tubules
stratified cuboidal epithelium structure
stacked box-like cells
stratified cuboidal epithelium function
protection
stratified cuboidal epithelium example
sweat glands
simple columnar epithelium structure
tall, column-like with elongated nuceli
simple columnar epithelium function
absorption and secretion
simple columnar epithelium example
bronchi
stratified columnar epithelium structure
stacked column-like cells
stratified columnar epithelium function
secretes and protects
stratified columnar epithelium example
ducts of gland
pseudostratified epithelium structure
irregularly shaped cells
pseudostratified epithelium function
secretes and moves mucus
pseudostratified epithelium example
lines the trachea
keratinized tissue
dead epithelial tissue that acts as extra protection
connective tissue is made of
mostly matrix with a few cells
function of connective tissue
support and connect tissues and orgns
three characteristics of connective tissue
specialized cells, lots of ground substance, and extracellular protein fibers
loose connective tissue is found
between organs
loose connective tissue function
absorb shock and bind tissues
areolar tissue structure
web-like
areolar tissue is found
between muscle fibers, surrounding blood vessels, and supporting abdominal organs
adipose tissue consists mostly of
fat storage cells
adipose tissue allows for
rapid storage and mobilization of lipids, insulation
adipose tissue is found
around the kidneys, cushioning the eye
reticular tissue structure
mesh-like framework
reticular cells produce
reticular fibers for other cells to attach to
reticular tissue is found around
the spleen and liver
compared to proper connective tissue, dense connective tissue contains more ___, allowing for__
collagen fibers, stretching
dense regular connective tissue structure
fibers run parallel to each other
dense regular connective tissue structure allows for
strength and resistance to stretching
some dense regular tissue includes___, allowing
elastin fibers, ligament to return to normal length
dense regular tissue is found in
ligaments and muscle tendons
dense irregular connective tissue structure
fiber direction is random
dense irregular connective tissue structure allows for
greater strength in all directions but less in one particular direction
dense irregular tissue is found in
dermis of the skin and arterial walls
supportive connective tissue function
provide structure, strength, and protection
hyaline cartilage provides
support with some flexibility
hyaline cartilage structure
short dispersed collagen fibers
hyaline cartilage is found
bronchi, rib cage, nose
fibrocartilage provides
some compressibility and pressure absorption
structure of fibrocartilage
thick bundles of collagen fibers though matrix
fibrocartilage is found in
knee joint meniscus, intervertebral disc
elastic cartilage provides
firm but elastic support
elastic cartilage structure
elastic fibers, collagen, and proteoglycans
elastic cartilage is found in
earlobes
bone provides
protection of organs and body support
bone structure
matrix mostly of collagen fibers
fluid connective tissue structure
specialized cells that circulate in a watery extracellular matrix
fluid connective tissue example
lymph and blood
lymph function
delivers molecules to blood vessels
blood function
transport materials through body to help response to injury and illness
muscular tissue structure
mostly cells, little matrix
are muscle cells excitable?
yes
what does it mean for cells to be excitable?
respond to stimuli
what does it mean for muscle tissue to be contractile?
can shorten and generate a force
is muscle movement voluntary or unvoluntary?
both
skeletal muscle cell structure
long, cylindrical fiber
skeletal muscle function
voluntary movement, protecting organs
skeletal muscle location
attached to bones and around entrance points to body
cardiac muscle structure
short, branched
cardiac muscle function
contraction to move blood through heart
cardiac muscle location
heart
smooth muscle structure
short, spindle shaped
smooth muscle function
involuntary movement
smooth muscle location
walls of organs and passageways
which two types of muscle tissue are striated?
skeletal and cardiac
structure of skeletal muscle tissue layers (outside to inside)
epimysium, perimysium, fascicle, endomysium, fiber
epimysium
sheath of dense, irregular connective tissue that wraps a muscle
perimysium
layer of connective tissue that surrounds a fascicle
fascicle
bundle of muscle fibers
endomysium
thin connective tissue of collagen and reticular fibers that encase each muscle fiber
muscle insertion
movable end of the muscle attached to the bone being pulled
muscle origin
end of the muscle that is attached to a fixed bone
the origin is often ___ and the insertion is often ___
proximal, distal
prime mover/agonist
principal muscle involved in an action
synergist
muscle that assists the agonist
fixator
muscle that stabilized the attachment bone for the agonist’s origin
center nervous system contains the
brain and spinal cord
nervous tissue structure
mostly cells, little matrix
is nervous tissue excitable?
yes
two types of neural cells
glial cells and neurons
neurons
single conductive cell that release chemical signals to target cells
neuron responsibilities
understanding and communicating in the nervous system
glial cells function
support nervous tissue
nerve fiber
axon of a neuron
nerve
many nerve fibers bound together with connective tissue
nerve composition from outer to inner
epineurium, perineurium, fascicles, endoneurium, axon
soma
cell body of a nucleus containing the nucleus and most organelles
processes
extensions off the cell body of a nucleus
axon
fiber emerging from the soma projecting to target cells
axon function
communicate with target cells through nerve impulse
dendrites
highly branches processes which receive info from other neurons
what does it mean for a neuron to be polar
information flows from the dendrite to the cell body and down the axon
unipolar neural cells
one process emerges from the cell and information flows in one direction
bipolar neural cells
two processes
multipolar neural cells
one axon and two or more dendrites
sensory neuron is also called
afferent
sensory neuron function
carry info about the environment to the CNS
most sensory neurons are uni/bi/multi polar?
unipolar
interneurons are found
in the CNS
interneuron function
receive info from sensory or other interneurons
motor neurons are also called
efferent
motor neuron function
receive info from sensory or interneurons and stimulate response
apical surface of a cell
where the work is occuring
basal surface of a cell
connects cell to other tissue
lumen
inside of a tubular structure
distended transitional epithelial tissue shape
several layers of tissue that become more compact/flattened when stretched
non distended transitional epithelial tissue shape?
several layers of tissue that become more compact/flattened when relaxed
bipennate muscle
fibers on two sides of the tendon
bipinnate muscle example
rectus femoris
multipennate muscle shape
multiple rows of muscle fibers and a tendon that branches into two
multipennate muscle example
deltoid
circular muscle shape
muscles surround each segment
circular muscle example
orbicularis oculi
are interneurons unipolar or multipolar?
multipolar
are motor neurons unipolar or multipolar
multipolar