tissues of the body Flashcards
what is histology?
the study of tissues
what are tissues?
groups of cells which are similar in structure and which perform common or related functions
what are the 4 basic kinds of tissue?
epithelial
connective
muscle
nervous
where is epithelial tissue found?
lining of the body
lining of cavities, tubes, ducts, blood vessels
lining of internal organs
functions of epithelial tissue
protection from _____ and _____ injury
physical / chemical
functions of epithelial tissue
protection against _____ invasion
microbial
functions of epithelial tissue
contains _____ which respond to ______
receptors / stimuli
functions of epithelial tissue
_______________ materials
filters, secretes, reabsorbs
functions of epithelial tissue
secretes serous fluids to ___________
lubricate structures
which is the most abundant and widely distributed tissue?
connective
functions of connective tissue
_________ structures
connects, binds, supports
functions of connective tissue
protects and cushions ___________
organs and tissues
functions of connective tissue
______ (fat)
insulates
functions of connective tissue transports \_\_\_\_\_\_\_\_ (blood)
substances
what is muscle tissue associated with?
bones
heart
walls of hollow organs
what are 7 muscle tissue functions?
movement locomotion maintains posture produces heat facial expressions pumps blood peristalsis
what is the main component of the nervous system?
nervous tissue
functions of nervous tissue
regulates and controls _________
body functions
functions of nervous tissue
generates and transmits ________
nerve impulses
functions of nervous tissue
supports, insulates, protects ________________
impulse generating neurons
what are the 3 types of epithelial tissue?
squamous
cuboidal
columnar
what are the 3 types of connective tissue?
adipose
bone
cartilage
what are the 3 types of muscle tissue?
skeletal
cardiac
smooth
squamous epithelium thickness
one cell
what does squamous epithelium form?
solid layer of cells that line blood vessels, body cavities, and internal organs
epidermis
are squamous epithelium stratified?
yes
cuboidal epithelium thickness
one cell
what shape is squamous epithelium?
roughly squarelike
what shape is cuboidal epithelium?
roughly cubelike
what does cuboidal epithelium line?
ducts in kidneys where reabsorption and secretory activities take place
columnar epithelium thickness
one cell
what shape is columnar epithelium?
roughly columnlike
what does columnar epithelium line?
digestive tract where reabsorption and secretion occurs
what is pseudostratified?
gives the appearance of more than one layer of columnar epithelial cells
what does adipose connective tissue look like?
roughly honeycombed
what are the 3 functions of adipose connective tissue?
stores fat as energy
insulates (fat)
supports and protects organs
what does bone connective tissue look like?
tree ring like
what are the 4 functions of bone connective tissue?
supports and protects
mineral storage
fat storage
blood cell production
cartilage connective tissue supports while __________
providing flexibility
cartilage connective tissue absorbs compression between _______ and ________
bones / joints
cartilage connective tissue hold open ________
respiratory passages
skeletal muscle activity
strong, quick discontinuous voluntary contraction
cardiac muscle activity
strong, quick continuous involuntary contraction
smooth muscle activity
weak, slow involuntary contraction
what is skeletal muscle attached to and move?
skeleton
skeletal muscle makes up ___% of body weight
40
skeletal muscle is made of _________ (multinucleate cells)
fibers
are skeletal muscle cells striated?
yes
where is cardiac muscle found?
only in the heart
are cardiac muscle cells striated?
yes
where is smooth muscle found?
walls of hollow organs (esophagus, intestinal tract)
are smooth muscle cells striated?
no
what is peristalsis?
squeeze, release
what does nervous tissue make up?
brain, spinal cord, nerves, sensory receptors
what is nervous tissue responsible for?
sensory perceptions
mental activities
stimulating muscle movements
secretions of many glands
what is the central nervous system made up of?
brain
spinal cord
what is the peripheral nervous system made up of?
nerves outside the brain and spinal cord
what does the peripheral nervous system connect?
the central nervous system to limbs and organs
the peripheral nervous system is the communication is between the ____ and ______
brain / extremities
sensory neurons
send information to CNS from internal or external stimuli
motor neurons
carry information from CNS to organs, muscle, glands
what is a neuron?
branching cells with many long processes
a neuron has a _____ nucleus
large central
neurons transmit impulses from ___________
one area of the body to other areas
neurons regulate activities through __________
neuron impulses
neurons or nerve cells receive ______ and send out ________
stimuli / action responses