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Chapter Four: Tissues and Systems (Nervous system (Main parts (nerve cells…
Chapter Four: Tissues and Systems
Nervous system
sends and receives messages, stimulated by bodies internal and external environments
Main parts
nerve cells
spinal cord
brain
perpipheral nerves
spinal fluid
special sensory organs
tongue
skin
nose
eyes
Functions
processing and interpreting messages
sending messages
sensory messages
cutaneous
function like a trap placed over a boat
main organ of the integumentary system,
commonly known as skin
16 percent total body weight skin is your largest, visible organ
skeletal system
function
provides movements
stores variety of material
protects organs
provides support and structure for body
main components
bones
joints
ligaments
cartiledge
Muscular system
voluntary muscles
movement created by conscions throughout, like scratching your nose
skeletal muscle attached to bones
involuntary muscles
Cardiac Muscle
Found in walls of heart
heart beats with involuntary affect
Tissue
Formed when there is a collection of similar
cells that act together to perform function
Connective
most common tissues, found scattered throughout body
organs, bones, nerves, muscles, membranes, skin
hold things together and provides structure and support
included in composition bones
Muscle
provides movement our bodies
form of tissues has ability to shorten itself
Types
smooth
cardiac
Skeletal
Epithelial
cells arranged in single layer with the same cell
flat, scale like cells (squamous)
cube shaped
columnar like
stretchy and variably shaped
Nervous
Act as rapid messenger service for body, messages can cause actions to occur
Two types:
Glia
function to support and connect neurons in place
Neurons
Dendrites
branch like
formation on neurons that receive sensory information
Axon
Trunk-shaped
transports information away from cell bodyu
Meningitis
Inflammation of menings caused by bacteria or virus
bacterial form can spread viadroplets from sneezing or coughing
symptoms
skin rash
nausea
fever
kidney failure
non-specific head aches
Skeletal Muscle
attached bones, cause movement, relaxing and contracting
called straited because of striped apperance
long tiber like cell with many nuclei in each cell
Synovial membrane
membrane associated with connective tissue
important membrane in space between bone joints and produces slippery substances
Membrane
sheet-like structures found throughout
body that performs special functions
classified as organs
epithelial membrane classified as
mucous
serous
cutaneous
Organs
results in two or more types of tuisses
creates the system
vital ones are those you can't live without
Serous
two layered membrane with potential space in between comprised of the parietal and visceral layer
Diabetes
as body uses up protein tissues start to break down becomes difficult to produce more tissues
damaged tissues
can damage tissue because since glucose cannot be moved inside body cells, cells must be burn fats and protein
Endocrine system
acts as control center for virtually all of bodys organs
endocrine glands release chemicals called hormones
helps regulate fluid and electrolyte balance, helps cope with stresses producted by infection and trauma
integumentary system
regulates temperature through sweating, shivering, and changes in diameter of blood vessels in skin
sensory information recieved from outside world comes from sensors in skin
includes skin
visceral
wraps around individual organs
produces serous fluid, reduces
friction between tissues organs
parietal
lines the wall of the cavities in which organs reside produces serous fluid and reduces friction between tissues and organs
mucous
lines openings to the outside world such digestive tract, respiratory system, urinary, and reproductive tract
Smooth Muscle
forms walls of hallow organs such as
in digestive system (visceral tissue) and blood vessels
involuntary muscle is uncontrolled