Read Slides 11-13. Which of the following statements accurately describes a similarity between the circulatory systems of humans and frogs?(1 point)

Question

Responses

Both humans and frogs have open circulatory systems.
Both humans and frogs have open circulatory systems.

Both humans and frogs have four-chambered hearts.
Both humans and frogs have four-chambered hearts.

Both humans and frogs have closed circulatory systems with pulmonary and systemic circulation
Both humans and frogs have closed circulatory systems with pulmonary and systemic circulation

Both humans and frogs mix deoxygenated and oxygenated blood in their hearts.
Both humans and frogs mix deoxygenated and oxygenated blood in their hearts.

Answer 1

The statement that accurately describes a similarity between the circulatory systems of humans and frogs is:

Both humans and frogs have closed circulatory systems with pulmonary and systemic circulation.

Humans have a closed circulatory system with a four-chambered heart, while frogs have a three-chambered heart but also maintain closed circulation with pulmonary (to the lungs) and systemic (to the body) pathways. However, the statement about mixing deoxygenated and oxygenated blood in their hearts is not entirely accurate, as humans do not mix blood in their hearts. Frogs can mix some blood due to their three-chambered heart, but this is not a similarity in the same way as the closed circulatory system.