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How the heart works
sandra.selmar
Created on February 24, 2023
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Transcript
How the heart works
aorta
left atrium
superior vena cava
The heart
pulmonary artery right
pulmonary artery left
right pulmonary veins
left pulmonary veins
aortic semilunar valve
mitral valve
right atrium
left ventricle
tricuspid valve
inferior vena cava
right ventricle
pulmonary semilunar valve
AORTA
AORTA
PULMONARY ARTERY
From the aorta, blood flows to all the organs. Oxygenated blood leaves the left ventricle through the aorta.
PULMONARY ARTERY
It carries deoxygenated blood from the right side of the heart to the lungs.
RIGHT VENTRICLE
It is bigger than the left ventricle.
RIGHT VENTRICLE
LEFT VENTRICLE
LEFT VENTRICLE
It is smaller than the right ventricle.
PAPILLARY MUSCLE
It prevents blood from flowing backwards.
PAPILLARY MUSCLE
PULMONARY SEMILUNAR VALVE
Aortic semilunar valve
Pulmonary semilunmar valve
It prevents blood from flowing backwards.
AORTIC SEMILUNAR VALVE
It prevents blood from flowing backwards.
SUPERIOR VENA CAVA
SUPERIOR VENA CAVA
Deoxygenated blood enters the right atrium through the superior vena cava, then it passes to the right ventricle.
VEINS
-It carries deoxygenated blood towards the heart
-It has low pressure
-It Venules farther from the heart; larger and thicker veins closer to the heart
ARTERIES
-It carries oxygenated blood away from the heart
-It has high pressure
-It is large near the heart, with thinner and smaller arterioles farther from the heart.
CAPILLARIES
-They connect arterioles and venules
-They are tiny
-Capillary walls: one layer of flat cells, the capillary endothelium.It facilitates the exchange of gases, nutrients and wast between the blood and the cells.