CARDIOVASCULAR
SYSTEM
BY: Erica Wooten
What is the Cardiovascular
System?
The cardiovascular system
is responsible for
transporting blood
throughout the body. It is
one of the major body
systems that makes sure
that the muscles and bones
are supplied with the
proper amount of oxygen
and blood.
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MAIN COMPONENTS
CARDIOVASCULAR SYSTEM
HEART
BLOOD VESSELS
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BLOOD
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THE HEART
With each heartbeat, blood is sent throughout our bodies, carrying
oxygen and nutrients to every cell. The heart is the key organ in
the circulatory system. As a hollow, muscular pump, its main
function is to propel blood throughout the body. Its also different
kind of muscle than those that move the skeleton. It has four
chambers, the two atria
and the two ventricles. It is
really like two pumps in
one
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_it.html
BLOOD VESSELS
There are three types of
vessels - arteries, veins, and
capillaries. The blood
vessels are responsible in
transporting blood
throughout the body which
contains the oxygen. This
allows the boy to stay alive.
BLOOD
Blood is consisting of liquid plasma
and cells. It carries oxygen oxygen
to other parts of the body. The
average human body contains about
4 to 5 liters of blood. As a liquid
connective tissue, it transports
many substances through the body
and helps to maintain homeostasis
of nutrients, wastes, and gases
Homeostasis
First, homeostasis is the deposition
of living to keep on functioning at an
optimum level, despite changes in
the enviorment within certain limits.
Or in other words, the process by
which the body attempts to
maintain a state of stable
physiological balance. The body
needs to maintain homeostasis in
order to stay alive. It maintains
homeostasis by carrying nutrients to
your cells and removing their
wastes. It also helps by carrying
hormones throughout the body.
Without the cardiovascular system,
none of the other systems in the
body can function.
Cellular Respiration
How do the cardiovascular and respiratory systems
work together? The heart is where circulation and
cooperation between the respiratory and the
cardiovascular systems begin. The heart has two
ventricles and two atria. The right ventricle and atrium
are where blood is received from the veins.
Deoxygenated blood flows into the right atrium of the
heart. When the heart muscle relaxes, the blood is
released from the atrium and into the right ventricle.
The right ventricle then pushes the blood through the
pulmonary valve and into the pulmonary artery, where
the blood is delivered to the lungs for retrieval of
oxygen. The blood is then returned to the left side of
the heart. As on the right side, the left atrium receives
the blood and sends it to the ventricle when the heart
muscle relaxes. Finally, the blood is pushed to the aorta
and delivered to the rest of the body.
THERMOREGULATION
Thermoregulation is a homeostatic function that enables you to
maintain this core temperature independent of how hot or cold your
surroundings are. The main organ involved is the skin, which is
controlled by the autonomic nervous system. When your surroundings
heat up, the brain triggers a series of chemicals which tell your blood
vessels to dilate (widen), which brings in the cardiovascular system.
RELATIONS WITH OTHER SYSTEMS
Integumentary
Skeletal
Muscular
Nervous
Endocrine
Lymphatic
Respiratory
Digestive
Urinary
Reproductive
skin cell stimulation produces local changes in blood
flow
delivers immune system cells to injury; clot
breaks in skin; removes
toxins; provides heat
provides calcium needed for normal heart muscle
contraction; protects blood cells developing in bone
marrow
provides calcium and phosphorous for bon
maintenance; delivers hormones and nutrit
cells
delivers oxygen and nutrients, removes cab
skeletal muscle contractions help move blood through
lactic acid, and heat during muscle activity
veins; protects superficial blood vessels; muscles make
up most of the heart organ
controls patterns of circulation; modifies heart rate
and regulates blood pressure
certain cells in blood vessels maintain bloo
barrier; helps to make cerebrospinal fluid
helps regulate production of red blood cells; envolved
in elevating blood pressure; adrenaline stimulates
distributes hormones throughout the body
cardiac muscle, elevating heart rate and contraction
secretes hormone ANP
force
defends against pathogens or toxins in blood; fights
distributes white blood cells; carries antibo
infections of cardiovascular organs; returns tissue fluid clotting response aids in slowing spread of
to circulation
causing germs
provides oxygen and removes carbon dioxide
transports oxygen and carbon dioxide betw
and other body tissues
distributes digestive tract hormones; carrie
provides nutrients; absorbs water and ions essential to
water, and ions away from sites of absorpt
maintenance of normal blood volume
delivers nutrients and toxins to liver
releases hormones to elevate blood pressure and
accelerate red blood cell production; removes waste
products
delivers blood to capillaries where filtration
accepts fluids and solutes reabsorbed durin
producton
estrogens may maintain healthy vessels and slow
development of hardening of the arteries with age
distributes reproductive hormones; provide
nutrients, oxygen, and waste
removal for developing fetus
How does it work with rest of the body
• Transportation: The cardiovascular system transports blood to almost all of the body’s tissues
The blood delivers essential nutrients and oxygen and removes wastes and carbon dioxide to
processed or removed from the body. Hormones are transported throughout the body via the
blood’s liquid plasma.
• Protection: The cardiovascular system protects the body through its white blood cells. White
blood cells clean up cellular debris and fight pathogens that have entered the body. Platelets
red blood cells form scabs to seal wounds and prevent pathogens from entering the body and
liquids from leaking out. Blood also carries antibodies that provide specific immunity to
pathogens that the body has previously been exposed to or has been vaccinated against.
• Regulation: The cardiovascular system is instrumental in the body’s ability to maintain
homeostatic control of several internal conditions. Blood vessels help maintain a stable body
temperature by controlling the blood flow to the surface of the skin. Blood vessels near the s
surface open during times of overheating to allow hot blood to dump its heat into the body’s
surroundings. In the case of hypothermia, these blood vessels constrict to keep blood flowing
only to vital organs in the body’s core. Blood also helps balance the body’s pH due to the
presence of bicarbonate ions, which act as a buffer solution. Finally, the albumins in blood pla
help to balance the osmotic concentration of the body’s cells by maintaining an isotonic
environment.