Why did separate systemic and pulmonary circulations evolve in species that have the high-pressure circulatory system required for rapid movement of blood?

Which of the following is not a true statement about open and closed circulatory systems?

a. Both systems have some sort of a heart that pumps a circulatory fluid through the body.

b. A frog has an open circulatory system; other vertebrates have closed circulatory systems.

c. The blood and interstitial fluid are separate in a closed system but are indistinguishable in an open system.

d. Some of the circulation of blood in both systems results from body movements.

Predict how Antarctic icefish can transport enough oxygen in their blood to meet their needs even though they lack hemoglobin.

If blood were supplied to all of the body's capillaries at one time,

a. Blood pressure would fall dramatically.

b. Resistance to blood flow would increase.

c. Blood would move too rapidly through the capillaries.

d. The amount of blood returning to the heart would increase.

Trace the path of an oxygen molecule in its journey from the air to a muscle cell in your arm, naming all the structures involved along the way.