The circulatory systems of different animals
Single Circulatory Systems: the blood is pumped from the heart to the gas exchange organ and then directly to the rest of the body.
Double Circulatory Systems: the blood is pumped from the heart to the gas exchange organ, back to heart and then to the rest of the body.
Double Circulatory Systems: the blood is pumped from the heart to the gas exchange organ, back to heart and then to the rest of the body.
There are two distinct parts to a double circulation:
• the pulmonary circulation, in which blood is circulated through the lungs where it is oxygenated.
• the systemic circulation, in which blood is circulated through all other parts of the body where it unloads its oxygen.
A double circulatory system is more efficient than a single circulatory system. The heart pumps the blood twice, so higher pressures can be maintained. The blood travels more quickly to organs. In the single circulatory system of a fish, blood loses pressure as it passes through the gills. It then travels relatively slowly to the other organs.
• the pulmonary circulation, in which blood is circulated through the lungs where it is oxygenated.
• the systemic circulation, in which blood is circulated through all other parts of the body where it unloads its oxygen.
A double circulatory system is more efficient than a single circulatory system. The heart pumps the blood twice, so higher pressures can be maintained. The blood travels more quickly to organs. In the single circulatory system of a fish, blood loses pressure as it passes through the gills. It then travels relatively slowly to the other organs.
The human circulatory system comprises:
• The heart - this is a pump
• Blood Vessels - these carry the blood around the body:
• The heart - this is a pump
• Blood Vessels - these carry the blood around the body:
- Arteries carry blood away from the heart and towards other organs.
- Veins carry blood towards the heart and away from other organs.
- Capillaries carry blood through organs