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Posterior is a word that derives from the latin prefix "post", meaning behind. Thusly, posterior is in reference to anything located behind something, so the posterior end of the heart is the one facing back.
The surface that is close to your sternum is called as anterior surface. The surface that is close to your back is called as posterior surface. Posterior surface is also called as the base of the heart.
there are 4 part to a heart left atrium, left ventricle, right atrium, right ventricle
right ventricle Ventricles, left and right
On the left it's blue and on the right it's red, but the heart curves in a way where it's on both sides.
No, the deoxygenated blood enters and leaves the heart through the right side and the oxygenated blood enters and leaves the heart through the left side. Both sides of the heart are separated by a wall called a septum. The wall between the left and right atria is the interatrial septum and the wall between the left and right ventricles is the interventricular septum.
A test that can be performed on either side of the heart, cardiac catheterization checks for different functions in both the left and right sides.