EXSS 175 Exam 3 Questions with Detailed Verified Answers

Page | 1



EXSS 175 Exam 3 Questions with
Detailed Verified Answers


Question: The cardiovascular system consists of


Ans: the heart, vessels, blood, and the circulation


Question: Peripheral circulation


Ans: blood supply for the extremities


Question: Cerebral circulation


Ans: blood supply for the brain


Question: Coronary circulation


Ans: blood supply to the heart muscle


Question: Main function of the heart


Ans: to move the blood through the vessels by contraction of muscle


Question: The heart pumps over ___ million gallons of blood per year


Ans: one

, Page | 2

Question: Where is the heart located in


Ans: the mediastinum


Question: The membrane surrounding and protecting the heart


Ans: pericardium


Question: Two main parts of the pericardium


Ans: fibrous pericardium and serous pericardium


Question: What is fibrous pericardium


Ans: tough, inelastic, dense irregular connective tissue that prevents over
stretching, protection, and anchorage


Question: What is serous pericardium


Ans: thinner, more delicate membrane, double layer (parietal layer fused
to fibrous pericardium and visceral layer called epicardium)


Question: Pericardial fluid located


Ans: between fibrous pericardium and serous pericardium. reduces friction
and is secreted into pericardial cavity


Question: The three layers of the heart wall (external to internal)

, Page | 3

Ans: epicardium, myocardium, and endocardium


Question: Epicardium


Ans: the external layer, visceral layer of serous pericardium, smooth and
slippery texture


Question: Myocardium


Ans: the middle layer, 95% of the heart is cardiac muscle


Question: Endocardium


Ans: the inner layer, smooth lining for chambers of the heart, valves and
continuous with lining of large blood vessels


Question: What are the four chambers of the heart


Ans: right atrium, left atrium, right ventricle and left ventricle


Question: What separates the right and left atrium


Ans: interatrial septum


Question: What separates the right and left venticle


Ans: interventricular septum


Question: What does the right atrium receive blood from

, Page | 4

Ans: superior and inferior vena cava, coronary sinus


Question: What does the left atrium receive blood from


Ans: four pulmonary veins


Question: What does the right ventricle receive blood from


Ans: right atrium


Question: What does the left venticle receive blood from


Ans: the left atrium


Question: What is the main function of the valves of the heart


Ans: prevent back flow of blood


Question: What are the two valves of the heart


Ans: atrioventricular valves and semilunar valves


Question: What is the main function of the AV valves


Ans: to prevent back flow WITHIN the heart


Question: What is the main function of the SL valves