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Page 852: Review
On the other hand, a closed circulatory system consists of a heart, which pumps blood, and arteries and veins that transport the blood and oxygen throughout the body.
1. Single-loop circulation
This circulation is characterized by a single pump that moves the blood in a unidirectional flow.
Example: When the heart of fishes receives the blood from the body capillaries through the atrium, then the blood is pumped out of the heart and into the gill capillaries through the ventricle.
2. Double-loop circulation
This pattern of circulation is characterized by a two-pump system.
Example: The first loop, which is located on one side of the heart, pumps oxygen-poor blood into the lungs. The second loop, which is on the other side of the heart, receives the oxygen-rich blood and pumps it into the rest of the body. through the systemic capillaries.
1. Single-loop circulation
This circulation is characterized by a single pump that moves the blood in a unidirectional flow.
Example: When the heart of fishes receives the blood from the body capillaries through the atrium, then the blood is pumped out of the heart and into the gill capillaries through the ventricle.
2. Double-loop circulation
This pattern of circulation is characterized by a two-pump system.
Example: The first loop, which is located on one side of the heart, pumps oxygen-poor blood into the lungs. The second loop, which is on the other side of the heart, receives the oxygen-rich blood and pumps it into the rest of the body. through the systemic capillaries.
Like other insects, a grasshopper contains blood vessels that empty blood into an open cavity; hence, it has an open circulatory system.