L5 External features of the heart (2)

Question 1

Atrioventricular (coronary) groove.

Answer 1

separates atria from ventricles all around, contains right and left coronary artery, and contains coronary venous.

Question 2

Inter-arterial groove.

Answer 2

ill-defined, hidden by aorta and pulmonary trunk, but it can be traced posteriorly.

Question 3

Anterior inter-ventricular groove.

Answer 3

on the sterno-costal surface, contains Anterior inter-ventricular branch of the left coronary, great cardiac vein.

Question 4

Posterior inter-ventricular groove.

Answer 4

on the diaphragmatic surface, contains Posterior inter- ventricular branch of the right coronary artery, middle cardiac vein.

Question 5

Anterior (sterno-costal) surface.

Answer 5

Right 2/3 (formed by the right ventricle).

Left 1/3 (formed by left ventricle).

Question 6

Inferior (Diaphragmatic) Surface.

Answer 6

Right 1/3 (formed by right ventricle).

Left 2/3 (formed by left ventricle).

Question 7

Base of the Heart.

Answer 7

Lies posteriorly and is formed mainly by the left atrium.

Is separated from the diaphragmatic surface of the heart by posterior part of the atrioventricular groove.