Question

Which of the following blood vessels in the circulatory system of frog has more oxygenated blood?

• A. Pulmocutaneous artery
• B. Pulmocutaneous vein
• C. Pulmonary artery
• D. Precaval veins

Answer 1

Answer: (B)

Pulmocutaneous vein

While the frog is at rest, it breathes through the buccal cavity and moist skin and rarely through lungs. The exchange of gases takes place through the moist skin (cutaneous respiration). Hence the blood returning from the skin (pulmocutaneous vein) has more oxygen than the blood returning from the lungs via pulmonary vein.

So, the correct answer is 'Pulmocutaneous vein'