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Lab Quiz 4

Heart Dissection

QuestionAnswer
The heart is enclosed by a double walled sac called the pericardium
The left ventricle discharges blood into the ___________ from which all systemic arteries of the body diverge to supply the body tissues Aorta
The right atrioventricular valve, or ___________, prevents back flow into the right atrium when the right ventricle is contracting tripcuspid valve
The heart serves as a double pump. The __________ side serves as the pulmonary circuit pump, shunting carbon dioxide rich blood to the lungs. right
In the heart, the ________ ventricle has thicker walls and a basically circular cavity shape. left
What is the name of the two receiving chambers of the heart? Atria
True or False. Blood flows through the heart in one direction-from atria to ventricles. True
The blood vessels that supply blood to the heart itself are the _________ arteries coronary
What is the function of the fluid that fills the pericardial sac? To reduce friction during heart activity.
location of the heart in the thorax mediastinum
superior heart chambers atria
inferior heart chambers ventricles
visceral pericardium epicardium
receiving chambers of the heart atria
layer composed of cardiac muscles myocardium
provide nutrient blood to the heart muscles CORONARY artery
lining of the heart chambers endocardium
actual "pumps" of the heart ventricles
drains blood into the right atrium SUPERIOR VENA CAVA & INFERIOR VENA CAVA AND CORONARY SINUS.
What is the function of the valves found in the heart Blood passes through a valve before leaving each chamber of the heart. They prevent the backward flow of the BLOOD IN heart
What is the role of the chordae tendineae? They anchor the AV valves against the large pressure changes that occur as the ventricles contract.
Differentiate clearly between the roles of the pulmonary and systemic circuits Pulmonary circulation provides gas exchange in the lungs. Systemic circulation provides the functional blood supply to all body tissues
If the mitral valve does not close properly, which circuit is affected systemic
Why might a thrombus (blood clot) in the anterior descending branch of the left coronary artery cause sudden death It blocks the blood flow to the left ventricle
When you measured thickness of ventricular walls, was the right or left ventricle thicker left
Knowing that structure and function are related, how would you say this structural difference reflects the relative functions of these two heart chambers? The left ventricle pumps blood through the entire body and the right onlyl pumps blood to the lungs. The left needs more force so the left side is more muscular.
Semilunar Ventricles
Atria
The semilunar valves permit blood to be forced into arteries but prevent backflow of blood from arteries into the ventricles.
Mitral valve allows the blood to flow from left to right atrium into left ventricle. Tricuspid valve stops back flow of blood from between the mitral and tricuspid valves
Created by: Bachnerjenn
 

 



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