Because they pump the blood out of the heart
because they push the blood away from the heart
If I am not wrong the lower two chambers of the heart are called as ventricles i.e. left ventricle and right ventricle while the upper two chambers of the heart are called as atria( plural of atrium) i.e. left atrium and right atrium.
ventricles
The ventricles are the discharging chambers for the blood. The left pumps blood through the systemic circulation, and the right through the pulmonary circulation.
The heart chambers are called atria and ventricles. Arteries and veins are blood vessels.
The heart chambers are not called arteries and veins. Heart chambers are atria and ventricles.
the atria
the ventricles or arteries
Atria receive blood into the heart and ventricles "discharge" it from the heart
The chambers at the bottom are called ventricles.
the ventricles
Heart
The heart is divided into four chambers. The two bottom heart chambers are called the ventricles. The upper chambers are the atrials.
The four chambers of the heart are the right and left atria, and the right and left ventricles. The atria are the upper chambers, and the ventricles the lower.
If I am not wrong the lower two chambers of the heart are called as ventricles i.e. left ventricle and right ventricle while the upper two chambers of the heart are called as atria( plural of atrium) i.e. left atrium and right atrium.
ventricles
ventricles.
The ventricles are the discharging chambers for the blood. The left pumps blood through the systemic circulation, and the right through the pulmonary circulation.