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Cardiovascular System
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A brief yet simple understanding on the cardiovascular system
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Cardiovascular system•
A cardiovascular system consist of heart, blood vessels, and approximately 5 lites of blood > blood vessels transport
The heart is the organ that turns on the cardiovascular system and is responsible for transporting oxygen, nutrients, hormones,
and cellular waste products throughout body
The heart size is about closed fist > even at rest the average heart pumps over 5 liters of blood every minute
The heart
%
The heart is a muscular pumping organ scatted medial to the lungs > middle line in thoracic region The heart
The bottom of heart is called its apex and is, turned to left so that about 2/3 of heart is
located on body's left side (1/3 on right) Heart's base
The top of heart is called heart's base and connects to great blood vessels of body; the
aorta, vena cava, pulmonary trunk, and pulmonary veins
Circulatory loops
Apex
There are 2 primary circulatory loops: The pulmonary circulatory loop and the systematic Blood circulation
:
Lungs
circulatory loop
Pulmonary circulation transports deoxygenated blood from right side of heart Pulmonary arteries
to lungs > where blood picks up oxygen and returns to leftside → the pumping
chambers that support this circulation are right atrium and right ventricle
The circulatory system carries highly oxygenated blood from left side of the heart Blood from lungs
Blood to lungs
to the rest of the body → it removes waste from body tissue and returns
deoxygenated blood to the right side of it > the pumping chambers involved are left
atrium and left ventricle Blood to the body
Blood from body
Blood vessels Right ventricle
Heart
Left ventricle
Blood vessels > blood's highways that allow blood to flow quickly and efficiently from the heart Lumen
to every regions of body and back again → size of these vessels correspond with the amount of Endothelium
blood passes
They contain a hollow area → lumen through which the blood is able to flow (thin in
capillaries and thick in arteries)
All blood vessels are lined with a thin layer of simple squamous epithelium > endothelium that
keeps the blood inside vessel the and prevents clotting > it is all the way till inside of heart where
it is called endocardium. There are 3 major types of blood vessels: arteries, capillaries and veins
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