Not if you're human. Amphibians and most reptiles have a three-chambered heart.
yes
Heart Your heart is quarter of an inch less than five inches long. Your heart is quarter of an inch less than four inches broad.
The lower chambers of the heart have a different function than the upper chambers. The lower chambers pump the blood out of the heart into the body and lungs.
The dolphin's heart has four chambers. This characteristic shows that the dolphin evolved from land based mammals, rather than from amphibians, which only have three chambered hearts.
The cardiac ventricles are the two lower chambers of the heart's four chambers. They are larger and more narrowed than the atria. They function by collecting the blood that flows into them from the atria and then contract in order to expel blood into the peripheral tissues, using major vessels to carry it to the extremities and lungs.
There are four chambers in a bird's heart: the left atrium, the right atrium, the left ventricle, and the right ventricle--just like in a human. Most warm blooded animals (birds and mammals) have this cardiovascular system setup in their hearts. If it interests you, the respiratory systemic anatomy is completely different in a bird than in a human.
there were more than four
A frog is an amphibian. An amphibian heart is characterized by three chambers. Two auricles and one ventricle constitute an amphibian heart. Hence, an amphibian heart appears like a pyramidal structure turned upside down.
The design of the mammalian heat is that there are two chambers used to receive blood from, and pump blood to the lungs, and then two more chambers used to received blood from, and pump blood to the rest of the body other than the lungs. This arrangement works more efficiently than if there are only two chambers receiving blood from and pumping blood to the entire body including the lungs.
Because each chamber has its own function, the blood goes somewhere else from each chamber.
A reduced amount of blood is pumped to the body by the heart, the lower chambers of the ventricles are filled with a less than normal amount of blood, and higher than normal blood pressures occur inside the heart?
The lower two chambers of the heart are the ventricles. The left ventricle is larger, with thicker walls, than the right ventricle.