Examlex
Symbiotic relationships are those in which organisms live in physical contact with one another.
Capillaries
The smallest blood vessels in the body, responsible for the exchange of oxygen, carbon dioxide, and other nutrients and waste products between the blood and tissues.
Arteries
Blood vessels that carry oxygen-rich blood away from the heart to the body's tissues, characterized by their strong, elastic walls.
Atrioventricular Valve
Valves located between the atria and ventricles of the heart that prevent the backflow of blood during ventricular contraction.
Semilunar Valve
Valve resembling a half-moon, located between the ventricles and their attached vessels.
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