Question

Кровоносна система амфібії-​

Answer 1

Ответ:

замкнена, серце трикамерне зі змішуванням крові у шлуночку

Answer 2

The Circulatory System of Amphibians

The circulatory system of amphibians, including frogs, toads, and salamanders, plays a crucial role in transporting oxygen, nutrients, and waste products throughout their bodies. It consists of a three-chambered heart, blood vessels, and blood cells.

Heart: Amphibians have a three-chambered heart, which consists of two atria and one ventricle. The atria receive oxygenated blood from the lungs or skin and deoxygenated blood from the body, respectively. The ventricle pumps the mixed blood to the lungs and body.

Blood Vessels: The blood vessels in amphibians include arteries, veins, and capillaries. Arteries carry oxygenated blood away from the heart to various parts of the body, while veins carry deoxygenated blood back to the heart. Capillaries are tiny blood vessels that allow for the exchange of oxygen, nutrients, and waste products between the blood and body tissues.

Blood Cells: Amphibians have different types of blood cells, including red blood cells, white blood cells, and platelets. Red blood cells contain hemoglobin, a protein that binds and transports oxygen. White blood cells are involved in the immune response and help fight infections. Platelets are responsible for blood clotting.

Circulation: Amphibians have a double circulation system, meaning that blood passes through the heart twice during each complete circuit. The first circuit is called the pulmonary circuit, where blood is pumped from the heart to the lungs to pick up oxygen and release carbon dioxide. The second circuit is called the systemic circuit, where oxygenated blood is pumped from the heart to the rest of the body.

Respiration: Amphibians have a unique respiratory system that allows them to breathe both through their lungs and their skin. Oxygen can be absorbed directly through the skin, especially when they are in water. However, when on land, they primarily rely on their lungs for respiration.