Heart and Lung function and anatomy
The Cardiovascular System
The cardiovascular system consists of the heart, arteries, capillaries and veins. The heart is a muscular organ, approximately the size of a fist and is located in the thoracic cavity behind the sternum and between the lungs. The coronary arteries are special arteries that supply blood to the heart muscles themselves.
The function of the heart is to pump blood; the left side receives oxygenated blood from the lungs and pumps it to the body through the arteries. The right side receives, through the veins, the blood that has circulated through the body and pumps it to the lungs to be oxygenated once again.
The Respiratory System:-
· Airway
· Neuromuscular System
· Alulae
· arteries, Capillaries, veins
The alveoli are surrounded by capillaries. The brain sends nerve signals to muscles in the thorax and diaphragm, causing us to breathe. With each inhalation, air is carried through the airways to the alveoli in the lungs, where oxygen and carbon dioxide are exchanged.
In combination with the respiratory system, the circulatory system supplies the oxygen necessary for life, and eliminates carbon dioxide from the body.
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