Lecture 3 The Heart Flashcards
Stationary blood would exhaust ___ and _____ quickly
oxygen and nutrient supply
Saturated blood would become saturated with ____ quickly
waste
A ________ allows blood to move throughout the body.
pumping heart
The heart beats approx. ____liters/min (resting) to approx. ____liters/min (exercise)
5;30
The heart pumps blood through a _____ system
closed
The right side of the heart carries _______ blood
deoxygenated
The left side of the heart carries ____ blood
oxygenated
What is the general size of the average heart?
Approx. 5.5”x3.5” (size of your fist)
Where is the heart located?
In the mediastinum region w/in the pericardial cavity, and lays on the diaphragm
The heart’s apex points _____, and the right chambers are slightly ______
left; anterior
The ___ of the heart is located on the superior border, between atria and great vessels, and is deep to the 3rd rib
BASE
The ___ of the heart is located at the “point” of the heart, a part of the left ventricle, and deep to the 5th intercostal space
APEX
The pericardium is filled with ____ fluid. How much?
Pericardial fluid. 10-20ml
This component of the heart consists of bands of fibro-elastic connective tissue interwoven with the myocardium.
Fibrous Skeleton of the Heart
What are the 4 functions of the fibrous skeleton of the heart?
shapes chambers, prevents overfilling, electrically separates atria from the ventricles, forms a frame for the valves
What is the name for the receiving chambers of the heart?
The 2 Atria
Are the atria thin or thick walled?
Thin walled (only has to pump to the lungs)
The left atrium ______
receives oxygenated blood from the LUNGS
The right atrium ______
receives de-oxygenated blood from the BODY
The pacemaker cells (aka ___&____ nodes) are located in the _____ _____ _____
SA and AV nodes; right atrial wall
What is the name for the pumping chambers of the heart?
Ventricles
Are the ventricles thin or thick walled?
Thick
The ventricles are split by a ____ and have ____ muslces
septum; papillary muscles
The right ventricle ______
pumps de-oxygenated blood to the lungs
The left ventricle ____
pumps oxygenated blood to the body
Which ventricle has the thickest wall? Why?
Left; needs to pump to the whole body
The _____ & _____ carry de-oxygenated blood from the body tissues to the right atrium
Superior and Inferior Venae Cavae
The ______ carries de-oxygenated blood fro the right ventricles to the lungs
Pulmonary Artery
The ______ carry oxygenated blood from the lungs to the left atrium
Pulmonary veins
The ___ carries oxygenated blood from the left ventricle to the body
Aorta
Which heart valve exists between the right atria and ventricle?
Tricuspid (Right AV Valve)
Which heart valve exists between the left atria and ventricle?
Bicuspid/Mitral (Left AV Valve)
The “heart strings” of the heart are the ______
chordae tendinae
Which heart valve exists between the right ventricle and the pulmonary artery?
Pulmonary Semilunar Valve
Which heart valve exists between the left ventricle and the aorta?
Aortic Semilunar Valve
What does AV and SV stand for
Atrioventricular Valve; Semilunar Valve
The medical name for a heart attack is a ____ ____
myocardial infarction
Myocardial Infarction leads to death of ______ due to insufficient _______; therefore the tissues degenerates and becomes nonfunctional (infarct)
heart tissue; insufficient blood supply
