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By Oliver Tang
The diagram shows how blood flows
inside the human body. Blood that flows
from above enters the Superior Vena Cava
while the blood from the lower parts of the
body enter the Inferior Vena Cava
The heart is the central organ within the human body. The heart
pumps blood inside the human body, without it, the body would
not be able to work properly.
To listen to the heartbeat in .WAV format click this
To listen to the heartbeat in .AU format click here
The Superior Vena Cava, is a vein which carries
de-oxygenated blood from the upper body to the
heart’s right atrium. The Innominate veins form
the Superior Vena Cava, which revieves blood
from the upper limb, head and neck. At the upper
right part of the heart, the azygous vein joins it
before it enters the right atrium. When reaching
adulthood, no veins separate the Super Vena
Cava from the right atrium. This causes the artial
and ventricular contractions are conducted
upwards to the jugular venous pressure.
The Inferior Vena Cava is very similar
to the Superior Vena Cava. Both carry
de-oxygenated blood, however the
Inferior Vena Cava carries deoxygenated blood from the lower part
of the body upwards, to the lower
parts of the heart. The IVC is
posterior to the abdonminal cavity,
and runs along the vertebral cavity. It
then runs along the right side and
enters the lower backside of the
heart. Due to the location of the
Inferior Vena Cava not being located
within the central area, its drainage
patterns are asymetrical. On the right
side, the gonadal and the suprarenal
veins drain blood into the IVC. On the
other end, the renal veins also drain
into the IVC.
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The Right Atrium is one of
four chambers within the
human heart. The Inferior
and Superior Vena Cava
give de-oxygenated blood to
the Right Atrium through the
tricuspid valve.
The left atrium of the heart
has similar properties to the
right atrium. Both one of four
chambers within the heart.
The recieves oxygenated
heart from the plumonary
veins, and pumps the blood
into the left ventricle
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Along with the two artiums and
the left ventricle, the right
ventricle is one of the four
chambers within the human
heart. The right atrium gives deoxygenated blood to the right
ventricle where it pumps the
blood into the plumonary artery.
The right ventricle has a
triangular shape, and extends
from the right atrium to the apex
of the heart.
The left ventricle is one of four
chambers within the human
heart. The left atrium gives the
left ventricle blood which is
pumped to the aorta valve.

The Aorta is the largest artery within the human body. The
aorta beings at the left ventricle, and pumps oxygenated
blood to all parts for the body in systemetic circulation.
The plumonary artery pumps
blood from the human heart to
its lungs. Excluding the umbilical
artery in the fetus, there are only two
arterys that carry deoxygenated
blood.
Blood rich in oxygen, is carried from
the lungs to the left atrium with the
help of plumonary veins. There are
only a couple of veins in the post- fetal
body of a human which carry oxygen
(red) blood.

The tricuspid valve is located at the
right side of the heart, between the
right atrium and the right ventricle. A
Tricuspid valve usually has 3 leaflets
and 3 papillary muscles. The
Tricuspic valve may also occur with
two or three leaflets, however, the
number may change varying over
time.

The aortic valve is a valve within the human heart. The valve is located
between the left ventricle and the aorta
.

Also known as the bicuspid valve or left artioventricular
valve, is a two flapped valve, in the heart. The mitral valve
is located between the left atrium and the left ventricle.
Because of its location, the mitral valve is known as the
“atrioventricular valve”.

The cardiac muscle is a type of
involuntary muscle found within
the heart. The job of the muscle
is to pump blood through the
circulatory system by
contraction.

Mri stands for Magnetic
Resonance Imaging. It uses a
strong magnetic field and
radiofrequency to obtain a
strong, clear image of the
internal organs. This is an
important procedure in
diagnosing the problem of a
patient.

A CT scan or Cardiac Computed Tomography is relevant anatomic and
nonvasive. If the potentiional hazards are known, a CT scan of the heart
has very low long term risks.

A Nuclear medicine scan is
used when a patient has
chest pains, and the
electrocardiography test is
inconclusive. Doctors use
scan the heart to see in
corresponding time whether
or no there is a lack of blood
within the heart.

Cardiac Ultrasound involves high
frequency sound waves, to create
an image of the heart. A cardiac
Sonographer performs the test.
Ultrasound is defined as very high
frequency sound waves, used to
help display an image.