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Heart Presentation
Michele Lin
Blk.: D
Blood Flow

Facts about blood flow

First the blood enters through the right atrium of the
heart. It flows into the right ventricle and into the
pulmonary arteries. The oxygen-poor blood flows
through to the lungs. The pulmonary veins take the
oxygen-rich blood to the left atrium and into the left
ventricle. From the left ventricle the oxygen-rich blood
flows into the aorta. The aorta pumps the blood to the
rest of the body.
Superior vena cava
 The superior vena cava
is a large, yet short
vein that carries deoxygenated blood from
the upper half of the
body to the heart's
right atrium.
Inferior vena cava
 The inferior vena cava
(or IVC) is the large
vein that carries deoxygenated blood from
the lower half of the
body into the heart.
Right atrium and Left atrium
-The right atrium is one of four
chambers in the human heart. It
receives de-oxygenated blood
from the superior and inferior
vena cava and the coronary
sinus, and pumps it into the
right ventricle through the
tricuspid valve.
-The left atrium is one of the four
chambers in the human heart. It
receives oxygenated blood from the
pulmonary veins, and pumps it into
the left ventricle.
Right ventricle & Left ventricle
 The right ventricle is one of
four chambers in the human
heart. It receives deoxygenated blood from the
right atrium via the tricuspid
valve, and pumps it into the
pulmonary artery via the
pulmonary valve.
 The left ventricle is one of four
chambers in the human heart.
It receives oxygenated blood
from the left atrium via the
mitral valve, and pumps it into
the aorta via the aortic valve.
Right
ventricle
Left
ventricle
Aorta
 The aorta is the largest
artery in the human
body, originating from
the left ventricle of the
heart and bringing
oxygenated blood to
all parts of the body in
the systemic circulation.
AORTA
Pulmonary artery & Pulmonary vein
 The pulmonary arteries
carry blood from the heart
to the lungs. They are the
only arteries that carry
deoxygenated blood.
 The pulmonary veins carry
oxygen-rich blood from the
lungs to the left atrium of the
heart. They are the only
veins in the post-fetal human
body that carry oxygenated
(red) blood.
Tricuspid valve & Aortic valve
 The tricuspid valve is on the right
side of the heart, between the
right atrium and the right ventricle.
The normal tricuspid valve usually
has three leaflets and three
papillary muscles.
 The aortic valve is one of the
valves of the heart. It lies between
the left ventricle and the aorta.
 The mitral valve and the tricuspid
valve are known collectively as the
atrioventricular valves because
they lie between the atria and the
ventricles of the heart and control
flow.
Aortic
valve
Mitral
valve
Tricuspid
valve
MRI scans & CT scans of heart
Blood circulation through lungs
 Blood first travels to the
right ventricle through an
atrioventricular valve and
is then sent to the lungs
to be reoxygenated. It
first travels through a
semilunar valve which
separates the right
ventricle and the
pulmonary artery. The
circulation of blood
between the lungs and
heart is called the
pulmonary circuit.
Ultrasound of Heart
 Ultrasound is sound with
a frequency greater
than the upper limit of
human hearing, this limit
being approximately 20
kilohertz (20,000 hertz).
Ultrasound has been
used to detect some
heart diseases.
Heart muscle
 The heart muscle is called
the Myocardium. The
myocardium is composed of
specialized cardiac muscle
cells with an ability not
possessed by muscle tissue
elsewhere in the body.
Cardiac muscle, like other
muscles, can contract, but it
can also conduct electricity,
like nerves.
The blood supply of the
myocardium is by the
coronary arteries.
Septum
 The septum of the heart is
the dividing wall between
the right and left sides of
the heart. That portion of
the septum that separates
the two upper chambers of
the heart is termed the atrial
septum while the portion of
the septum that lies between
the two lower chambers of
the heart is called the
ventricular septum
Nuclear medicine scan of heart
The scan is requested
when a patient has chest
pain and the doctors are
not sure if it is coming
from the heart or not.
The scan displays in real
time whether there's any
ischaemia (lack of blood
supply) in a particular
area of the heart. area
of the heart.
area of the heart.
Sound of heart beat