endocardium correct answer: The inner most layer of the heart.
It forms the lining and folds back onto itself to form the 4
valves. It is in this layer that the conduction system is found
Myocardium correct answer: The middle and contractile layer
of the heart. It is made up of striated m fibers interspersed with
intercalated disks.
Epicardium correct answer: The outermost layer of the heart. It
is actually the inner (viseral) layer of the pericardium.
The Pericardium correct answer: Is a sac in which the heart is
contained. It consists of the outermost fibrous pericardium and
the serous pericardium which consists of a visceral and parietal
portion. The visceral layer invests the heart and is also called the
epicardium. The parietal layers lines the fibrous pericardium.
Between the visceral and parietal layers is a serous fluid which
serves to prevent friction as the heart beats.
Right Atrium correct answer: Receives deoxygenated blood
returning to the heart from the body via the superior vena cava
which carries blood from the upper body and the inferior vena
cava which carries blood from the lower body
Right Ventricle correct answer: Receives deoxygenated blood
from the right atrium which is pumps to the lungs fro
oxygenation through the pulmonary artery (trunk) to the right
and left pulmonary arteries
The Pulmonary Arteries correct answer: The only arteries in the
body that carry deoxygenated blood.
Left Atrium correct answer: Receives oxygenated blood
returning from the lungs via the right and left pulmonary veins.
The pulmonary veins correct answer: Are the only veins in the
body that carry oxygenated blood
Left Ventricle correct answer: Receives the oxygenated blood
from the left atrium and pumps it to the body through the aorta,
the largest artery of the body
The heart is actually … correct answer: A 2- sided separated by
a septum. The upper chambers consist of the right and left atria,
the lower chambers are the right and left ventricles. The
chambers pump simultaneously – both atria contract together,
then the two ventricles.
The Heart Valves correct answer: The purpose of the heart
valves is to prevent back-flow of blood thereby assuring unidirectional flow thru the heart
The atrioventricular valves (AV) correct answer: So-called
because they are located between the atria and the ventricles
Tricuspid valve correct answer: Located between the right
atrium and the right ventricle. As the name connotes, it has three
cusps.
Mitral valve correct answer: Located between the left atrium
and the left ventricle. It has two cusps and its also called the
bicuspid valve
The semilunar valves correct answer: They have half-moon
shaped cusps
Pulmonic valve correct answer: Located between the right
ventricle and the pulmonary trunk
Aortic valve correct answer: Located between the left ventricle
and aorta
Heart murmurs correct answer: Are caused by diseases of the
valves or other structural abnormalities
S1 correct answer: The first heart sound is due to the closure of
the mitral and tricuspid valves
S2 correct answer: Second heart sound is due to the closure of
the aortic and pulmonic valves
Vessels of the heart correct answer: The arteries supplying the
heart are the right and left coronary from the aorta. The veins
accompany the arteries, and terminate in the right atrium.
The heart is influenced by the Autonomic Nervous System
(ANS) correct answer: Which is subdivided into the
sympathetic and parasympathetic nervous system