Which three components are common to the circulatory systems of most living animals?

a. arteries, veins, capillaries
b. vessels, heart, circulating fluid
c. aorta, ventricles, atria
d. blood, heart, cavities

B. vessels, heart, circulating fluid

Explanation:

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answer: national resource conservation services

national resource conservation services is the us. based approach that provides technical and financial assistance for natural resource management. nrcs society in conservation of resources by involving in activities like farmland protection, flood prevention, watershed protection, urban conservation, conserves economic and environmental conditions. it conducts soil surveys and implements the policy of natural resources management on the society.

oxygen = 21% of the atmosphere

nitrogen = 78%

carbon dioxide = 0.1%

argon =0.934%