4
AssignmentMultiple Dropdowns

Gas Exchange

Question 4 • 2026-2027 EDGE Human Anatomy and Physiology B

Use the drop-down menus to select the best answers.Carbon dioxidePlasma✔ OxygenBicarbonate ion is a life-sustaining, odorless gas in the air.

Answer
is a life-sustaining, odorless gas in the air.:

Oxygen

is a waste product of respiration:

Carbon dioxide

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