Lab Exam 3 BQ and CC

the right coronary artery supplies….

Right atrium

most of the right ventricle

part of the left ventricle

the SA and AV nodes

The left coronary artery supplies…

Left atrium

Most of the left ventricle

Part of the right ventricle

The interventricular system

Pericardial cavity

A potential space surrounding the heart between the parietal and visceral layers of serous pericardium

Transverse pericardial sinus

Behind the ascending aorta and pulmonary trunk. Connects the left and right sides of the pericardial cavity.

Fossa Ovalis

Oval depression in the interatrial septum indicating the loacation of teh fetal foramen ovale, where blood was shunted from right atrium to left atrium in the fetus

Pectinate muscle

Pectinate=comb-shaped. The muscle has ridges like the teeth in a comb.

Tendinous cords

“Heart strings”

Sino-atrial node

Pacemaker of the heart

Purkinje fibers

Form a network that transmits impulses to typical cardiac muscle cells so that the ventricular walls contract in sequence from the bottom up so that blood is “milked” out of ventricles

How does blood flow through the heart and where oxygenated

Veins—>superior/inferior vena cava—→right atrium—→tricupsid valve—→right ventricle—→pulmonar valve—→pulmonary artery—→lungs—→left atrium—→mitral valve—→left ventricle—→aortic valve—→aorta—→rest of body

Oxygenated from lungs onward

where is blood oxygenated

Lungs—→left atrium—->mitral valve—→left ventricle—→aortic valve—→aorta—→rest of body