Heart and great vessel

Question 1

location of heart

Answer 1

mediastinum

Question 2

Pericardium tissue layers

Answer 2

1) visceral - intimate contact w/ heart
2) parietal - sandwiched in the middle
3) fibrous- strong tissue layer

Question 3

blood flow through heart

Answer 3

IN superior vena cava, tricuspid valve, right ventricle, pulmonary valve, pulmonary artery OUT TO LUNGS
IN Pulmonary vein, left atrium, mitral valve, left ventricle, aortic valve, aorta OUT

Question 4

Cardiac cycle

Answer 4

two area contract = ventricles relax (diastole)
ventricles contract (systole) = aorta relax

Question 5

valves

Answer 5

between atria and ventricles
one way blood flow - close preventing backflow

Question 6

Blood flow thru heart valves

Answer 6

R atrium - TRICUSPID VALVE - R Ventic
L atrium- MITRAL VALVE- L Ventric
R Ventr- PULMONARY SEMILUNAR VALVE- Pulm art
L ventricle - AORTIC SEMILUN. VALVE- Aorta

Question 7

Ventr. Diastole

Answer 7

Right AV (tricusp.) valve- open
Left AV (mitral) - open
Aortic semilunar - closed
Pulm. semilunar - closed

Question 8

Ventr Systole

Answer 8

Right AV (tricusp.) valve- closed
Left AV (mitral) - closed
Aortic semilunar - open
Pulm. semilunar - open

Question 9

Conduction system

Answer 9

1) sinoatrial node - pacemaker of heart
2) atrioventricular node - electrical conduction connects + sends signal
3) AV bundle - sends elect. signal
4) right and left bundle branches (to R and L vent.)
5) purkinje fibres - distribute to muscle tissue, ensure depolarization