Study terms

Question 1

Myocardium

Answer 1

Cardiac muscle (arranged in spirals)
Fibrous skeleton (collagen and elastin fibers, provides support and electrical insulation)

Question 2

Atrioventricular (AV) valves

Answer 2

Between atria and ventricles
-Open when pressure is greater in atria
-Close when pressure is greater in ventricles

Question 3

Semilunar valves

Answer 3

Between ventricles and large arteries
-Open when pressure is greater in ventricles
-Close when pressure is greater in arteries

Question 4

Pulmonary circuit

Question 5

Systemic circuit

Question 6

Intercalated discs

Answer 6

How adjacent cells are connected, allows AP to spread easily between cells, acts as a single coordinated unit called syncytium

Question 7

Syncytium

Answer 7

2:
1. Atrial- walls of two atria
2. Ventricular- walls of two ventricles
separated by fibrous tissues
APs are conducted between the two through the AV node

Question 8

Plateau

Question 9

Extracellular fluid