Przedstaw role krwi w transporcie gazów oddechowych

- "receives" oxygen from the lungs and transports it to all living human cells (because oxygen combines with respiratory dye - hemoglobin, which is in the blood)

- transports CO2 (carbon dioxide) to the lungs

otherwise:

thanks to blood, there is gas exchange:

a) external (occurs in the lungs) - blood donates CO2 and draws oxygen

b) internal (occurs in tissues and cells - blood donates oxygen and takes away CO2

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