Heart (3) Flashcards
1
Q
Ventricle Contraction
A
Wringing motion = Spiral orientation of cardiac muscle
- propels the blood out
2
Q
Purpose of Fibrous Skeleton
A
- PREVENTS over-dilation
- PROVIDES attachment
- FORMS electrical insulator
3
Q
Venous return of heart
A
Great, Middle, and Small cardiac vein
DRAINS into coronary sinus
DUMPS into right atrium
4
Q
Where does the impulse come rom for an SA Node
A
Vagus Nerve
- parasympathetic and sympathetic signals
5
Q
Pacemaker of the heart
A
SA Node
- it initiates and regulates
