Which animals have a pulmocutaneous circuit?Multiple choice question.All aquatic vertebratesAll fishAll reptilesAmphibians that live in water

Step 1: Break Down the Problem

We are tasked with identifying which animals possess a pulmocutaneous circuit. This type of circuit refers to a system where blood passes through the lungs and the skin (cutaneous respiration) in addition to the heart.

Step 2: Relevant Concepts

1. Pulmocutaneous Circuit: In certain animals, particularly amphibians, this circuit allows for gas exchange both through the lungs and the skin. It's notable in species that often inhabit both aquatic and terrestrial environments.
2. Aquatic vs. Terrestrial: We need to analyze the options based on their habitats and respiratory systems.

Step 3: Analysis and Detail

1. All aquatic vertebrates: This category is too broad; not all aquatic vertebrates have a pulmocutaneous circuit.
2. All fish: Fish primarily use gills for respiration; they do not have a pulmocutaneous circuit.
3. All reptiles: Reptiles primarily use lungs for respiration without a pulmocutaneous circuit (except for some specific adaptations).
4. Amphibians that live in water: Amphibians, such as frogs and salamanders, exhibit a pulmocutaneous circuit. They can breathe through their skin while in water and also have lungs for respiration.

Step 4: Verify and Summarize

Through examining the options, the only group that possesses a pulmocutaneous circuit is Amphibians that live in water. Other options do not fit the criteria for having such a circuit.

Final Answer

Amphibians that live in water have a pulmocutaneous circuit.