Question

Place the labels to describe the role of the lungs and blood in transporting oxygen and carbon dioxide in the body.

Blood cells transport
carbon dioxide to
the lungs.

Oxygen from the
lungs enters the
alveoli in the lungs.

Red blood cells supply
oxygen to the cells of
different organs in
the body.

Oxygen enters
the red blood cells
in the capillaries.

Red blood cells
collect the waste
carbon dioxide.

Answer 1

Oxygen from the lungs enters the alveoli in the lungs.

Answer 2

Hemoglobin is contained in red blood cells, which efficiently carries oxygen from the lungs to the tissues of the body. Hemoglobin also helps in the transportation of carbon dioxide and hydrogen ions back to the lungs.