Transcript The Circulatory System

THE CIRCULATORY SYSTEM
Presented By:
Gerardo Cruz
Mary Luz Razon
Shaquila Lewis
Taquiyyah Boyles
Michelle Estella
MAJOR FUNCTIONS
o
o
o
o
o
o
Carry oxygen
To circulate all vital fluids
throughout the body
-nourishes all the body
systems
Transport blood, hormones,
white blood cells and
chemicals through the heart,
lungs and major organs
Help in fighting diseases by
using white blood cells
Prevents over bleeding by
forming blood clots
Helps maintain body
temperature by transporting
heat
MAJOR PARTS OF THE CIRCULATORY
SYSTEM AND THEIR FUNCTIONS

ARTERIES
VEINS





The heart: is the key organ in
this system; propel blood and
keep blood moving throughout
your body.
The blood: is pumped by
your heart; carries nutrients,
water, oxygen and waste
products to and from your
body cells
The blood vessels are
divided into 3 parts:
Arteries: carry oxygen
blood away from the heart
Capillaries: connect
arteries to veins
Veins: carry blood back
toward your heart
COMPONENTS OF THE BLOOD










Red Blood Cells (or erythrocytes)
Red blood cell make up about 40-50% of the
total blood volume.
Transport oxygen from the lungs to all of the
living tissues of the body and remove carbon
dioxide.
Red blood cells are produced in our bone
marrow from stem cells at about 2-3 million
cells per second.
Hemoglobin is the gas transporting potein
molecule, makes up 95% of red blood cells.
White Blood Cells (or leukocytes)
Exist in variable numbers and types but make
up a very small part of the blood’s volume,
normally only about 1% in healthy people.
Most white blood cells are made in the bone
marrow from the same stem cells as red blood
cells, others are produced in the thymus
gland.
Our white blood cells are the first responders
for our immune system.
White blood cells remove bacteria, viruses,
and fungi, they also remove dead or dying
blood cells.
COMPONENTS OF THE BLOOD CONT.









Platelets (or thrombocytes)
Platelets work with blood clotting chemicals at
the site of wounds.
They do this by adhering to the walls of blood
vessels, thereby plugging the ruptura in the
vascular wall.
Platelets also release coagulating chemicals
which cause clot to forming the blood that can
plug up narrowed blood vessels.
Platelets also help fight infections by releasing
proteins that kill invading bacteria and some
other microorganisms.
Plasma
Plasma is a relatively clear liquid water,
protein and SALT solution which carries the
red and white blood cells , platelets and some
other chemicals.
Normally, 55% of our blood’s volume is made
up of plasma, About 95% of it consist of water.
Plasma brings nourishment to the blood cells
and removes the waste products of
metabolism.
o
o
HEART CONTRACTION AND BLOOD
FLOW
The heart is a muscle that works like a pump to send blood throughout the body.
It is divided into right and left sides that work together to pump blood.
o
-Right side-pumps blood from the heart to your lungs through the pulmonary artery
o
-Left side-pumps blood to other parts of your body through the aorta
o
Has four chambers: right atrium and ventricle, left atrium and ventricle
o
Has four valves that regulate the flow of blood through the heart, its chambers and the arteries.
Pumping Cycle begins when blood from your body that is low in oxygen
returns through the superior and inferior vena cava to fill your heart’s
right atrium.
Right Ventricle; The process of the blood flow begins in the right
atrium. The right atrium receives blood returning to the heart from the
superior and inferior venacava. From here the blood flows to the right
ventricles.
 Right ventricle: when full of blood, the tricuspid valve closes
preventing blood from flowing back into the right atrium. It then
contracts, the pulmonary valve opens and blood is pumped into your
artery. The pulmonary valve quickly closes to prevent blood from flowing
back into the right ventricle. Oxygen rich blood returns from the lungs
through the pulmonary vein and has filled the left atrium.
 Left atrium: contracts, the mitral valve opens, and blood is pumped
into the left ventricle. Occurring at the same time a new contraction takes
place in the right atrium.
 Left ventricle: When full of blood, the mitral valve closes, preventing
blood from flowing back into the left atrium. When it contracts, the aortic
valve between your left ventricle and aorta opens. The contraction pumps
oxygen-rich blood into the aorta and on to the rest of the body.
 Aortic valve: quickly closes, preventing blood from flowing back into
the left ventricle. Occurring at the same time a new contraction takes
place in the right ventricle.
Meanwhile, the heart’s atria has filled with blood and the cycle
continues.
“THE PUMP PUMP PUMP OUR BLOOD”
SONG
Tune from Miley Cyrus’ Party In The U.S.A
The right atrium’s where the process begins
where the CO2 blood enters the heart
Through the tricuspid valve to the right ventricle
(the pulmonary) artery and lungs
Once inside the lungs, it dumps its carbon dioxide and picks up its oxygen supply
Back to the heart through the pulmonary vein, atrium and left ventricle
The aortic valves where the blood leaves the heart then its channeled to the rest of the body.
The arteries, arterioles and capillaries! Bring the oxygenated blood to the cells! The oxygenated
blood to the cells! BRING THE BLOOD TO THE CELLS!
CHORUS:
So were going to pump pump pump our blood, all around our body
Were studying the flow (like yeah)
The heart is a pump pumpin’
So were going to pump pump pump our blood
So we can all get an ‘A’ (yeahhhh!!)
Well show you Ms. Guillory (yeahhhh!!)
The tissues and the cells trade off waste and CO2, which is carried through the venules and the
veins
Through the larger vena cava to the atrium and lungs, and we’re back to where we started to
the heart.
SONG CONTINUES TO FADE AWAY…
HOW THE CIRCULATORY SYSTEM
INTERACTS WITH OTHER SYSTEMS
o






The circulatory system provides the
following for other body systems:
Digestive: important factor in the
transportation of proteins and nutrients
Respiratory: moves the oxygenated
blood throughout the body and
deoxygenated blood back to the lungs
Excretory: removes waste
Endocrine: moves the hormones
produced in this system
Immune: blood pumped in the
circulatory system contains white blood
cells, which is part of this system
Nervous: sends more blood to form
clots when a cut occurs
FACTS TO KNOW ABOUT THE
CIRCULATORY SYSTEM
o
o
The circulatory system is an organ system cell and helps stabilize body
temperature and pH to maintain homeostasis
The body’s circulatory system really has three distinct parts

o
Pulmonary circulation

Coronary circulation

Systemic circulation
The circulation system is made up of the vessels and the muscles that help
and control the flow of the blood around the body. This process is called
circulation.
o
The heart beats around three billion times in the average person’s life
o
The body of an adult contains over 60,000 miles of blood vessels!
o
A heartbeat is really the sound of the valves in the heart closing as they push
blood through its chambers
Any questions?