Left recurrent laryngeal nerve found here.

Branches into R common carotid and R subclavian arteries

Connects the pulmonary trunk to the descending aorta.

Blood flowed from R ventricle into aorta via this so could bypass pulmonary trunk since fetus didn't need oxygenated blood.

In embryo: Ductus arteriosum

Patent Ductus Arteriosus: Failure to close, oxy blood bypasses lungs, heart is working too much. Leads to heart failure.

Branches into L recurrant laryngeal nervem and esophageal plexus.

Contains Sympathetic, parasympathetic and somatic sensory fibers.

Right Coronary Artery

(RCA)

Runs in atrioventricular sulcus.

Branches supply the right atrium and ventricle.

Branches into SA node, Marginal artery (Supplies the R. ventricle)and Posterior descending artery (supplies AV node).

Branches to the interventricular septum and anastomoses with the circumflex branch of the L. coronary.

Determines whether heart is L or R dominant.

Left Coronary Artery

(LCA)

Divides into anterior descending (LAD) and circumflex artery.

Branch of LCA.

Runs in interverticular sulcus.

Supplies atrioventricular bundle and bundle braches.

Branch of LCA.

Gives off the left marginal artery to supply the lateral wall of the L ventricle.

Runs with LAD.

Anterior of heart

All venous return from 3 cardiac veins drains into this, which then drains directly into R. atrium.

Embryology: Left horn of sinus venosus.

Oval shaped depression in the R. atrium.

Fusion of septum primum and septum secundum to form atrial septum.

ASD (atrial septal defects) - incomplete fusion. Usually of little clinical signif if hole is small

Connects interventricular septum to base of the anterior papillary muscle in r. ventricle.

Contains specialize cardiac myocyte cells that are part of the conducting system.