Pulmocutaneous circulation

Definition

Pulmocutaneous circulation is a circulatory pathway in amphibians where blood flows from the heart to the lungs and skin for gas exchange. This system allows amphibians to utilize both lungs and skin for respiration.

5 Must Know Facts For Your Next Test

1. Pulmocutaneous circulation is found in amphibians like frogs.
2. This type of circulation involves a three-chambered heart with two atria and one ventricle.
3. Oxygenated blood from the lungs and deoxygenated blood from the body mix partially in the single ventricle.
4. The term 'pulmocutaneous' combines 'pulmo' (lungs) and 'cutaneous' (skin) indicating dual respiratory surfaces.
5. This circulatory system is advantageous for amphibians living both in water and on land.

Review Questions

• What types of animals primarily exhibit pulmocutaneous circulation?
• How does pulmocutaneous circulation benefit amphibians?
• Why does pulmocutaneous circulation involve a three-chambered heart?

Related terms

Systemic Circulation: Circulates oxygenated blood from the heart to the rest of the body.

Pulmonary Circulation: Transports deoxygenated blood from the heart to the lungs for oxygenation and back.

Cutaneous Respiration: Gas exchange that occurs through an organism's skin.