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30 Cards in this Set

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Repolarize or repolarization
The process where the membrane, cell, or fiber, after depolarization, is polarized again, with positive charges on the outer and negative charges on the inner surface.
depolarize or Depolarization
The destruction, neutralization, or change in direction of polarity.
Right Ventricle
The lower chamber on the right side of the heart. It receives the venous blood from the right atrium and drives it by the contraction of its walls into the pulmonary artery.
Left Ventricle
The lower chamber on the left side of the heart that receives the arterial blood from the left atrium and drives it by the contraction of its walls into the aorta.
Right Atrium
The upper chamber on the right side that receives the blood from the venae cavae and coronary sinus.
Left Atrium
The upper chamber of the left side of the heart which receives the blood from the pulmonary veins.
The Pericardium
The Outer most layer of the heart. It is a saclike structure that encases the heart.
The Myocardium
The middle layer of the heart, consisting of cardiac muscle. (pump)
The Endocardium
The innermost layer of the heart
Pericardial Cavity
The potential space between the parietal and visceral layers of the serous pericardium.
Tricuspid Valve
The valve closing the orifice between the right atrium and right ventricle of the heart; its three cusps are called anterior, posterior, and septal.
Pulmonic Valve
The valve at the entrance to the pulmonary trunk from the right ventricle
Mitral Valve
The valve at the entrance to the pulmonary trunk from the right ventricle
Aortic Valve
The valve at the entrance to the pulmonary trunk from the right ventricle
Function Of The heart
The Heart is a muscular organ that functions primarily to propel sufficient blood thru the vascular system to meet the needs of the body
Main Function of the 4 Heart valves
The primary function of the valves is to to allow blood flow in 1 direction thru the hearts chambers and prevent a back flow of blood
Antrioventricular Valves
They seperate the Atria from the Ventricles, they are the Mitral and tricuspid valves
Blood Supply to the heart is povided by:
The right and left Coronary Arteries
Systole
Contraction of the heart, especially of the ventricles, by which the blood is driven through the aorta and pulmonary artery to traverse the systemic and pulmonary circulations,
*120/80
Diastole
Normal post-systolic dilation of the heart cavities, during which they fill with blood; diastole of the atria precedes that of the ventricles; diastole of either chamber alternates rhythmically with systole or contraction of that chamber.
120/*80
Artery
A relatively thick-walled, muscular blood vessel conveying blood away from the heart and pulsating with each heartbeat. With the exception of the pulmonary and umbilical arteries, the arteries convey red or aerated blood.
Veins
A blood vessel carrying blood toward the heart; all the veins except the pulmonary carry dark or deoxygenated blood.
Arteriole
A minute artery with a tunica media comprising only one or two layers of smooth muscle cells; a terminal artery continuous with the capillary network.
Venules
A venous radicle continuous with a capillary
Bradycardia
owness of the heartbeat, usually a rate less than 60 beats per minute.
Tachycardia
Rapid beating of the heart, conventionally applied to rates over 100 beats per minute
3 Main components of the Heart
1.Heart-(cardio)
2.Blood Vessels-(vascular)
3.Blood-(vascular)
Blood Main Funtions
1.Transport
2.Regulate
3.Protect
What is Blood made of?
1.Cells=Red cells,white cells & platelets
2.Serum=h20 & Plasma
Mayocardial infarction
Infarction of an area of the heart muscle, usually as a result of occlusion of a coronary artery
(heart attack)