What is the main gas exchanged in the alveoli? ...

Topics: Breathing System Quiz

What is the main gas exchanged in the alveoli?

A. Nitrogen

B. Oxygen

C. Carbon dioxide

D. Water vapour

Select your answer:

Topics:

Cell and Tissue The Cell Cycle & Cancer Tutor Oral Biology Fats And Oil Lymphatic System Oxygenation Genetics: Viruses and Bacteria Muscoskeletal System Cell Theory and Microbiology DNA, RNA, Proteins Terms and Definitions - Diseases Mitosis for Mya Cardiovascular System Anatomy Introduction to Histology Human Excretory System

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What types of observations are descriptive?
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