Lecture 19- The Heart

Question 0

Myocardium of Right Atrium is supplied by what artery?

Answer 0

Right Coronary A.

Question 1

Myocardium of Left Atrium is supplied by what artery?

Answer 1

Circumflex A.

Question 2

Which chamber is the thickest?

Answer 2

Left Ventricle

Question 3

Which chamber is the thinnest?

Answer 3

Right atrium

Question 4

What does the atria contain?

Answer 4

Pectinate muscles

Question 5

What does the ventricles contain?

Answer 5

Trabeculate cornae (& papillary muscles)

Question 6

What kind of epithelium is endocardium?

Answer 6

Simple squamous

Question 7

Intercalated discs contain..?

Answer 7

• Desmosmes

* Gap Junctions

Question 8

Define sustole

Answer 8

Contraction of a chamber

Question 9

Define diastole

Answer 9

Relaxation of a chamber

Question 10

What do Atrioventricular (AV) Valves have.

Answer 10

Chordae Tendinae & attach to papillary muscle

Question 11

Where are semilunar valves located?

Answer 11

Between ventricles & large arteries (pul. Trunk & aorta)

Question 12

1st heart sound

Answer 12

“Lupp” = Closing of the AV valves

Question 13

2nd heart sound

Answer 13

“Dupp” = closing of semilunar valves

Question 14

Blood Flow Through the heart.

Answer 14

(Opening of coronary sinus, SVC, IVC)➡️ RA➡️ Tricuspid valve (R AV valve)➡️Pulmonary Semilunar valve➡️Pulmonary trunk➡️ Pulmonary Arteries➡️ (low O2)➡️ Lungs➡️Pulmonary veins (High O2)➡️LA➡️ Bicuspid valve (L AV valve)➡️ LV➡️ Aortic Semilunar valve➡️ Aorta

Question 15

Another name for visceral pericardium

Answer 15

Epicardium