Friday, October 9, 2009 ; Circulatory System
This is a summary on circulatory system. Let me know if that is enough.
First of all, understand these points:
- Carbon dioxide is considered a waste material.
- It can only removed through blood in the lungs.
- Oxygen is essential from respiration, which involved the use of oxygen and food to convert to energy. Respiration can be carried out by different animal cells.
- Oxygen can only be obtained from the blood in the lungs.
- Oxygen is transported from the lungs to the heart and the heart will distribute the oxygenated blood to other parts of the body like our hands, legs, head, chest, etc.
Lungs
- Exchange gases with blood from the heart.
- Oxygen is carried by the blood that comes from the heart and goes to the heart.
- Carbon dioxide is removed from the blood that comes from the heart.
Heart
- Pumping action of heart results in our pulse rate (beats per minute).
- Receives blood high in oxygen from the lungs and then distributes the oxygenated blood to other parts of the body so that respiration can be carried out.
- Receives blood high in carbon dioxide from other parts of the body and then distributed blood low in oxygen and rich in carbon dioxide to the lungs for exchange of gases.
Basically, the heart is like a bus terminal distributing appropriate blood to either the lungs or other parts of the body.
Hope these notes help.
posted by Allan at
9:53 PM
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