Circulatory system
The atrium belongs to the cardiovascular system, which is responsible for circulating blood throughout the body. The atrium is a chamber within the heart that receives blood from the body and sends it to the ventricles for pumping to the lungs or rest of the body.
The coronary sinus is a large vein that collects deoxygenated blood from the coronary circulation and returns it to the right atrium of the heart. This blood has supplied oxygen and nutrients to the heart muscle and is now in need of oxygenation.
They are the right ventricle, left ventricle, right atrium, and left atrium. For more details you can take a look here: http://heartdisease.about.com/cs/starthere/a/chambersvalves.htm http://www.revolutionhealth.com/articles/chambers-of-the-heart/tp10241
The plural is atria. This can be used architecturally or with reference to chambers of the heart.
The ridges in the anterior wall of the right atrium are called pectinate muscles or pectinate ridges. These muscular ridges are important for increasing the surface area of the atrium to allow for more efficient contraction and blood flow.
Circulatory system
Circulatory system
The atrium belongs to the cardiovascular system, which is responsible for circulating blood throughout the body. The atrium is a chamber within the heart that receives blood from the body and sends it to the ventricles for pumping to the lungs or rest of the body.
right atrium
The coronary sinus empties into the right atrium of the heart. It serves as a drainage system for deoxygenated blood from the myocardium.
The vascular circuit that connects the right atrium to the left atrium is the pulmonary circulation.
From the venous system, blood enters the right atrium, then goes to the right ventricle, then in to the pulmonary system, then to left atrium, then left ventricle then back out to the body.
Coronary sinus
right atrium is the chamber of heart in which the veins empty themselves of deoxygenated blood from all parts of body. right atrium always carry the deoxygenated blood and then pumps it into right ventricle....
Pulmonary circuit
The path a blood cell takes throughout the circulatory system starting at the right atrium and ending at the capillaries is called a ventricle.
the size of the right atrium is smaller that the left atrium.