Cardiology

Question 1

Rule #4

Answer 1

heart has 3 functions

• electrical conduction
• contraction during systole
• relaxation during diastole

Question 2

Body-wide functions

Answer 2

delivers oxygen, water, hormone, regulatory chemicals to tissues
removes carbon dioxide and metabolic wastes from tissues
thermoregulation
supports blood flow functions (kidneys, lungs, digestion and absorption, metabolism, reproduction)

Question 3

3 layers of the heart

Answer 3

endocardium: single layer of endothelial cells
myocardium: thick myocardial cells
epicardium (serous pericardium): thin layer of mesothelial

Question 4

heart valves and locations

Answer 4

Tricuspid: right sided, right atrioventricular valve
Pulmonic: left sided, cranial most
Mitral: left sided, ventral most (intersection of costochondral junction and sternum)
Aortic: left sided, dorsal most

Question 5

Rule #2

Answer 5

the heart is a muscle

Question 6

myocardium features

Answer 6

lots of mitochondria

intercalated disks - conduct electrical impulse, connects cells together

Question 7

Contractile unit of the heart

Answer 7

sarcomere