1. It is a process which is characterized by taking an oxygen and elimination of gaseous .waste products in the lungs.
a. circulation b. excretion
c. respiration. d.digestion
2. the brain is the largest and the central organ of the nervous system. what is the central organ of respiratory system?
a.stomach b.heart
c.kidneys d. lungs
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Answer:
the largest mouth in the world
Explanation:
1. A
2. D
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