Adult amphibions have a heart contohlng how many chambers? Two Three 5 Four One

## Step 1<br />The question is asking about the number of heart chambers in adult amphibians. Amphibians are a group of cold-blooded vertebrates that includes frogs, toads, salamanders, and newts. They are unique in that they can live both in water and on land.<br />## Step 2<br />The heart of an adult amphibian is a three-chambered organ. This means it has three chambers: two atria and one ventricle. The atria receive blood from the body, while the ventricle pumps the blood out to the body.<br />## Step 3<br />The three-chambered heart is a characteristic feature of amphibians. This is different from the four-chambered heart found in mammals, which includes two atria and two ventricles. The four-chambered heart is more efficient because it completely separates oxygenated and deoxygenated blood, which is not the case in the three-chambered heart of amphibians.