326 Pure Anatomy: The Heart/Lungs

Where would you find the trabeculae carneae muscles? What do they do?

Inside the right and left ventricles. They make the heart walls bumpy to prevent them from sticking during contraction, as well as add more surface area. Along with the papillary muscles, they prevent the backflow of blood into the atria by stabilizing the AV valves

The Chordae tendinae are attached to ________ which when they contract, close the AV valves to prevent blood back flow into the atria

Papillary muscles

What closes the semilunar valves?

Strictly ventricular pressure, no muscle attachment closes them

The RCA (right coronary artery) gives rise to _________ artery, and ________ artery

Right marginal artery and posterior descending artery

The LCA (left coronary artery) gives rise to the _______ artery and _________ artery. The left ______ artery wraps around the heart, giving rise to the _______ artery

left circumflex, anterior interventricular (aka. left anterior descending) artery, circumflex, left marginal

Sympathetic cardiac cardiac nerves are derived from which portion of the spinal cord? And parasympathetic cardiac nerves originate where?

T1-T5, medulla and travel via vagus nerve

Name the branches of the aortic arch in proximal-to-distal order, and what each branches into (if any)

Brachiocephalic trunk (which branches into the right common carotid and right subclavian arteries), the left common carotid artery (later turns into internal carotid, then middle cerebral), and the left subclavian artery (

What nerve innervates the diaphragm that you find near the heart?

The phrenic nerve

What vessels does the superior vena cava branch off into?

The superior vena cava first of all branches off into the brachiocephalic vein and the left subclavian vein. The brachiocephalic vein then branches off into the right subclavian vein and the internal jugular vein.

Where do the pulmonary arteries enter in the lungs

In the hilium

Label the two missing fissures

Label the artery/vein inserts in the right lung

Label the artery/vein inserts of the left lung

Label the fissures

The branching of the trachea starts at the _____. The primary bronchi further bifurcate into the _____ or secondary bronchi, the ______ or tertiary bronchi, and conducting bronchioles.

carina, lobar, segmental

Which lung contains the cardiac notch?

Left lung