Examlex
The chambers of the heart that receive blood from the veins are the ________.
Concurrent Exchange
A process in which two substances, such as blood and air in the lungs, flow in opposite directions to maximize the transfer of gases or other molecules.
Tracheal Tubes
A network of air tubes in insects that branch throughout the body for gas exchange.
Spiracles
External respiratory openings in insects and some amphibians and fish, used for breathing.
Organismic Respiration
The process by which living organisms take in oxygen and release carbon dioxide, essential for energy production.
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