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The mammalian circulatory system is a vast network of blood-filled
vessels that delivers blood to every cell of the organism
The circulatory system is a mass flow system, moving blood
on mass from one part of an organism to another
The circulatory system is essential for ensuring that materials
are transported between the various exchange surfaces
of the organism
The capillaries of the blood system are the sites for
exchange of materials between the blood and the tissues
The capillary networks surrounding the alveoli of
the lungs are the sites at which gas exchange takes place
The capillary networks within the villi of the small intestine
receive and transport the digested food materials needed
by the cells of the organism
The circulatory system The heart, together
with the blood vessels and the
is linked with exchange
blood that they contain forms
surfaces THE CIRCULATORY SYSTEM…read more

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The human heart,
except during foetal The LEFT SIDE
life, is completely of the heart
divided into right receives
and left sides OXYGENATED
BLOOD
The heart has four from the lungs
chambers with an and then delivers
upper and a lower it to the body
chamber on each tissues
side
The upper chambers
are the right and
left atrium The RIGHT SIDE
(RA and LA), and of the heart
the lower chambers receives
are the ventricles DEOXYGENATED
(RV and LV) BLOOD
Blood always enters from the body
the heart along tissues and then
veins, which deliver delivers it to the
blood to the atria lungs
Blood is pumped
away from the
heart along arteries,
which originate in
the ventricles
LORD…read more

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Left side of the heart receives
Oxygenated blood and delivers
it to the body tissues
Right side of the heart receives
Deoxygenated blood and
delivers it to the lungs…read more

Slide 5

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The heart pumps The heart pumps
oxygenated blood deoxygenated blood
TO the body tissues TO the lungs
and receives and receives
deoxygenated blood oxygenated blood
FROM the body FROM the lungs
tissues
This circuit in which This circuit in which
blood flows from the blood flows from the
heart TO the body heart TO the lungs
systems and back and back to the
to the heart is called heart is called
THE THE
SYSTEMIC PULMONARY
CIRCULATION CIRCULATION
The human circulation is a double circulation as there are two distinct
circuits along which blood flows…read more

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The CAROTID THE PULMONARY VEIN
ARTERY delivers delivers oxygenated blood
oxygenated blood from the lungs to the LEFT
to the neck, ATRIUM of the heart
head and brain
Deoxygenated blood The oxygenated blood enters
enters the right the LEFT VENTRICLE,
ventricle from where which pumps the blood
it is pumped to the along the AORTA towards
lungs along the the body organs
PULMONARY ARTERY Smaller arteries branch
from the AORTA in order
Veins carry deoxygenated blood to deliver this oxygenated
away from the body organs. The blood into the various organs
veins join to form two large veins
called the VENAE CAVAE The CORONARY ARTERIES
The VENAE CAVAE deliver deliver oxygenated blood to
deoxygenated blood the heart muscle
to the RIGHT ATRIUM
of the heart HEPATIC The HEPATIC ARTERY
VEIN delivers oxygenated blood to
The liver receives blood HEPATIC the liver
from BOTH the hepatic PORTAL The RENAL ARTERIES
artery AND the VEIN deliver oxygenated blood
HEPATIC PORTAL to the kidneys
VEIN RENAL
VEIN
The hepatic portal vein transports blood, rich in the products of digestion, from the gut to the liver…read more

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