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The circulatory system is composed of the 4 chambered heart and a series of blood vessels that carries blood throughout the body.
Pericardial Sac
Pericardial Sac
The heart is surrounded by a fibrous sac composed of two thin layers called the pericardial sac (also known as the pericardium). The pericardial fluid lies between the two layers helps reduce friction between the heart and the lungs when the heart contracts.
Four Chambers of the Heart
Four Chambers of the Heart
Right Atrium
The right atrium receives deoxygenated blood from the vena cava. When it contracts, it pushes blood through the tricuspid valve and empties the blood into the right ventricle
Right ventricle
The right ventricle receives blood from the right atrium and pushes the blood into the pulmonary artery, through the pulmonary valve, to be oxygenated by the lungs. The movement of blood through the valve results in a heartbeat.
Left atrium
It receives oxygenated blood from the pulmonary veins. During contraction, the left atrium pushes blood through the bicuspid valve into the left ventricle
Left ventricle
This is the most muscular chamber in the heart. It receives blood from the left atrium and pumps the oxygenated blood into the aorta, allowing oxygenated blood to circulate the body
Arteries
Arteries
Aorta
Aorta
Also known as the largest artery in the body, the aorta is the main artery that carries oxygenated blood from the left ventricle to the body
Carotid
Carotid
The Carotid Artery carries oxygenated blood to the brain
It is located on the sides of the neck
Subclavian
The Subclavian Artery carries oxygenated blood to the wings
located in the collarbones
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