Question

Скольки камерное сердце у рыб, земноводных, рептилий, млекопитающих? И если не сложно замкнутая или незамкнутая у каждого из них кровеносная система?

Answer 1

Рыбы: двухкамерное сердце,кровеносная система замкнутая.
Земноводные: у взрослых особей трёхкамерное сердце,у личинок -- двух-,кровеносная система замкнутая. 
Рептилии: трёхкамерное(у аллигаторов -- четырёх-),замкнутая. 
Млекопитающие: четырёхкамерное,замкнутая.

Answer 2

Number of Chambers in the Heart of Fish, Amphibians, Reptiles, and Mammals

The number of chambers in the heart varies among different animal groups. Here is the breakdown:

- Fish: Most fish have two-chambered hearts, consisting of one atrium and one ventricle. - Amphibians: Amphibians, such as frogs and salamanders, generally have three-chambered hearts, consisting of two atria and one ventricle. - Reptiles: Most reptiles, including snakes, lizards, and turtles, have three-chambered hearts as well, with two atria and one ventricle. - Mammals: Mammals, including humans, have four-chambered hearts, consisting of two atria and two ventricles.

Circulatory System: Closed or Open

The circulatory systems of animals can be classified as either closed or open.

- Fish: Fish have a closed circulatory system, meaning that their blood is contained within vessels and circulates throughout the body. - Amphibians: Amphibians have a closed circulatory system as well, with blood flowing through vessels. - Reptiles: Most reptiles have a closed circulatory system, similar to fish and amphibians, with blood circulating through vessels. - Mammals: Mammals also have a closed circulatory system, with blood flowing through a network of vessels.

In summary, fish, amphibians, reptiles, and mammals have different numbers of heart chambers, but they all have closed circulatory systems.

Please note that the information provided here is based on general knowledge and may vary among different species within each animal group.