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.
no, otherwise the SA Node wouldn't be able to control the contraction of the heart
The SA Node in the right atrium
The two upper chambers are called the atria. A single atria is an atrium.
Contraction of veins would increase venous return to the right atrium. It would increase the efficiency of the heart pumping.
right atrium and left atrium
The four chambers are; Left atrium Right atrium Left Ventricle Right Ventricle The two upper chambers are called atria (singular: atrium) and the two lower chambers are called ventricles. There are four chambers of the heart - the right atrium, left atrium, right ventricle and left ventricle.
the ventricles
the upper chambers of the heart are called the atria. (or atrium singular)
Right ventricle, left ventricle, right atrium, left atrium.
right atrium, left atrium, left ventricle and right ventricle
The vascular circuit that connects the right atrium to the left atrium is the pulmonary circulation.