Heart and lung lab review

What does the LAB RAT acronym refer to?

Blood flow in the heart

• Left Atrium Bicuspid

• Right Atrium Tricuspid

What are the layers covering the heart?

• Visceral Pericardium (directly covering surface)

• Parietal Pericardium (perimeter layer)

What are the layers covering the lungs?

• Visceral Pleura (directly covering surface)

• Parietal Pleura (perimeter layer)

What are the three surfaces of the lungs?

Costal, Diaphragmatic, Mediastinal

Correct blood flow?

Right Atrium —> Tricuspid valve —> Right ventricle

—> Pulmonary trunk —> pulmonary vein —> left atrium —> bicuspid valve —> left ventricle —> aorta

Costal surface of lung

Directly borders the ribs

Diaphragmatic surface of lung

most inferior surface, borders diaphragm

Mediastinal surface of lung

Borders the mediastinum

True ribs

Ribs 1-7

False ribs

ribs 8-10

Free-floating ribs

11-12

Bronchiole

air; walls of cartilage (very thick)

• walls not collapsible

Pulmonary artery

receives deoxygenated blood from heart

• collapsible but springs back

Pulmonary vein

passes oxygenated blood to heart

• thinnest walls

• collapsible, stays down

What are those tiny strings inside the L + R ventricle?

cordae tendinae

Internal intercostals

spaces b/w ribs, closer to sternal body

External intercostals

spaces b/w ribs, further from sternal body

Pectoralis minor function

scapular stabilization

Serratus anterior function

Protraction and stabilization of the scapula

The outer bony stuff on the sternum, what’s it called?

Costal cartilage

What’s this bump on the sternum?

Sternal angle

What’s the feature at top of sternum?

Manubrium

What are these muscles next to cordae tendinae?

Papillary muscles