When we breathe in...................enters our lungs and passes into the ...

When we breathe in……………….enters our lungs and passes into the blood.

A. oxygen

B. carbon dioxide

Select your answer:

Topics:

DNA Structure, Replication, Proteins Endocrine System Terms Vet Terminology Life Cycle - Bee Embryology Human Digestive System Immunity & Cancer Nervous, Musculoskeletal Systems, Integumentary Systems Oxygenation Digestion and Absorption of Carbohydrates Regulating the Cell Cycle Hair Evidence Physical Education History of Healthcare Autoimmune Disease

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A. Creamy cake, pizza and coke

B. Fruit cake, veggie burger and orange juice

C. Fruit cake, fried noodle and mineral water

D. Chocolate cake, fish burger and canned drinks