Cardiovascular System Test Questions
with Answers Correct!!
Overview of Cardiovascular System: Design of Heart - ANSWERS- A closed system of
the heart and blood vessels
(1) The heart pumps blood
(2) Blood vessels allow blood to circulate to all parts of the body
- The human heart is designed as a pair of
side-by-side pumps. The two sides of the
heart allow for two routes for blood to flow.
Right side of the heart = pulmomary circulation
Left side of the heart = systemic circulation
Functions of Cardiovascular System - ANSWERS(1) Deliver oxygen and nutrients to
cells and tissues
(2) Remove carbon dioxide and other waste products from cells and tissues
Heart: Location and Oreintation - ANSWERSLocation
- in the Thorax, between the lungs
Orientation
- Pointed apex directed toward left hip
- Base points toward right shoulder
About the size of a human fist
Heart: Pericardium - ANSWERSa double-walled sac
(1) Fibrous pericardium is loose and superficial
(2) Serous membrane is deep to the fibrous pericardium
(3) Serous fluid fills the space between the layers of pericardium
Heart: Three Layers of the Heart Wall - ANSWERS(1) Epicardium
- Outside layer
- Connective tissue layer
(2) Myocardium
- Middle layer
- Mostly cardiac muscle
(3) Endocardium
, - Inner layer known as endothelium
Heart: Four Chambers - ANSWERS(1 and 2) Atria (right and left) superior, low pressure
- Receiving chambers
(3 and 4) Ventricles (right and left) inferior, high pressure
- Discharging chambers
Heart: Corresponding Valves to Chambers Individual - ANSWERS(1) Tricuspid Valve:
between right atrium and right ventricle
(2) Pulmonary Semilunar Valve: between the right ventricle and pulmonary artery
(allows blood to flow from heart and lungs)
(3) Mitral Valve (bicupsid valve): between the left atrium and the left ventricle
(4) Aortic Semilunar Valve: between left ventricle and the aorta (carries blood from the
heart to the rest of the body
Heart: Valves - ANSWERSAllow blood to flow in only one direction, to prevent backflow
Atrioventricular (AV) valves: between atria and
ventricles
(1) Bicuspid (mitral) valve (left side of heart)
(2) Tricuspid valve (right side of heart)
Semilunar valves—between ventricle and artery
(1) Pulmonary semilunar valve
(2) Aortic semilunar valve
Heart: When Valves Open and Close - ANSWERSAV valves
- Anchored in place by chordae tendineae ("heart strings")
- Open during heart relaxation and closed during
ventricular contraction
Semilunar valves
- Closed during heart relaxation but open during ventricular contraction
Heart: Structure of left and right ventricle - ANSWERSAtria are thin walled, Ventricle is
thicker walled
Flow of Blood through the Heart - ANSWERS(1) Heart valves dictate a one-way flow of
blood
through the heart
(2) Blood begins its flow with the right ventricle
pumping blood to the lungs (pulmonary
circulation)
(3) In the lungs, the blood loads O2
and unloads CO 2
(4) Oxygen-rich blood from the lungs enters the heart at the left atrium and is pumped to
the body tissues by the left ventricle (systemic circulation)
(5) Blood returns to the heart through the right atrium