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A&P lll

Heart

QuestionAnswer
how many chambers does the human heart have ? 4
where is the base and apex located base: superior apex: pointing inferior and to to the left
where is the heart located thoracic cavity in the mediastinum
apex made by the tip of the left ventricle
base posterior surface
where does the inferior surface rest on the diaphragm
where is inferior surface located b/t apex and right boarder (right ventricle )
left boarder (pulmonary boarder) faces left lung
what are the 4 chambers of the heart 2- upper- right atrium & left atrium 2-lower -right ventricle & left ventricle
what is the coronary sulk boundaries b/t 2 chambers of the heart
where is the heart positioned in the thoracic cavity starts at the2nd rib middle is at the sternum botton rest on the diaphragm
how many layers of the heart wall are there and name them 3 layers outer-epicardium middle myocardium innermost - endocardium
what is the pericardium covering around heart
which is larger and thicker, ventricles or atria? ventricles
where does the right atrium receive blood from superior vena cava, inferior vena cava and coronary sinus
what forms most of the base of the heart left atrium
where does left atrium receive blood from lungs
what covers the heart and how many layers pericardium and it has 2 layers
what are the layers of the heart pericardium visceral pericardium layer or (epicardium) inner layer tight parietal pericardium layer outer layer loose
endocardium lines heart chambers
epicardium covers the surface of the heart
what is systole contraction of the heart
what is diastole relaxation of the heart
what is the heart beat when it contracts
what do the valves of the heart do seperate artrial chambers above from ventricles below
what are the valves called AV valves- antrioventricular valves
what is the left AV valve know as bicuspid valve or mitral
where is the left AV or bicuspid valve located b/t left atrium and ventricle
what is the right AV valve know as tricuspid valve
where is the right AV or tricuspid valve located b/t the right atrium and ventricle
where is the semilunar valve (SL valve) located b/t each ventricular chamber
where is the pulmonary semilunar valve located At the beginning of the pulmonary artery
The aortic semi lunar valve is located where At the beginning of the aorta
What does the aortic semi lunar valve allow allows blood to flow out of the left ventricle up into the aorta and prevents the back into the ventricles
What does the pulmonary semi lunar valves allow for Allows blood going to the Lungs to flow out of the right ventricle going to the Lungs to flow out of the right ventricle
what is the first Lub sound of the heart vibration and closure of the AV valve
what does closure of the AV valve prevent prevents blood from rushing back up into the atria during contraction
Where does blood enter the right atrium from From two large veins calledFrom two large veins called superior vena cava and in inferior vena cava
What does the right heart pump receive Oxygen poor blood from the veins
After entering the right atrium where does the blood flow It flows through the right A/V or tricuspid valveI and enters the right ventricle
What happens when blood reaches the lungs Oxygen is added and carbon dioxide is lost
What is pulmonary circulation Flow of blood from the right atrium to the lung and back to the left atrium
What is systemic circulation The Flow of blood from the left ventricle throughout the body and back to the right atrium
what is coronary circulation Delivery of oxygen and removal of waste products from the myocardium heart muscle
how does blood flow into the heart by 2 small vessels right and left coronary arteries
what is atherosclerosis a type of hardening of the arteries
what are the 2 major circulation of the body
where do the cardiac veins empty into Coronary sinus
Where do the coronary sinus empty into Right atrium
How long does each cardiac cycle take for average person .8 second
What is a complete heartbeat called Cardiac cycle
what is the Sinoatrial node,( SA node) called pacemaker
what is dysrhythmia abnormality of heart rhythm
what is sinus dysrhythmia irregularities in heart beat during breaking cycle
fibrillation cardiac muscles contract out of step
what happen when the P wave occur as the AV node and atrial walls depolarize
what is dedpolarization Electrical activity that triggers contraction of the heart muscle
What are the three characteristics of an ECG P wave QRS complex T-wave
what is ECG , EKG or electrocardiograph The graphic record of the hearts electrical activity
when does repolarization Begins just before the relaxation phase of cardiac muscle activity
depolarization is ______ contract
Repolarization is ______ is just before relax
what does the QRS complex result from as a result of the depolarization of the ventricles
what does the t wave result from electoral activity generated by the depolarization of the ventricles
What vessels carry Deoxygenated blood Pulmonary artery
Blood returning from the Lungs enters which hard chamber Left atrium
The right atrium receives venous blood from which the resources Cardiac sinus superior vena cava and inferior vena cava
What is the correct passage of blood through the heart right atrium tricuspid valve right ventricle pulmonary valve pulmonary artery pulmonary vein left atrium mitral valve left ventricle aortic valve aorta
what is cardiac output ( CO) The volume of blood pumped by one ventricle per minute shows the distrubiton of the hearts output to some of the major organs
What is the cardiac output determined by Heart rate HR and stroke volume SV
What does heart rate referred to The number of heartbeats( cardiac cycles) per minute
What does stroke volume refer to The volume of blood ejected from the ventricle during each heartbeat
What is the average cardiac output 5L
what is the formula for cardiac output ( beat ) (volume) (volume) HR _____ X SV. ________. = CO________ ( min ) (beat) (min)
where does hematopoiesis happen in the epiphysis ( end oft long bones)
what is the inner most layer of the heart endocardium
what is venous return the volume of blood returned to the heart by the veins
what is heart failure inability of the heart to pump enough blood to sustain life
what is cardiomyopathy disease of myocardial tissue
faliure of the right side of the heart accounts for how much of all heart failures 1/4 of ll cases
since the ventricles are thicker and larger thatn the atria they are sometimes called _____ chambers discharging ( larger and thicker like a hose expelling water)
since the atria are smaller than the ventricles they are often called _____chambers receiving
Ventricles of the heart are separated into right and left sides by a wall called what interventricular septum
The thin layer of tissues lining the interior of each of the heart chambers is called the endocardium
When the heart is contracting it is said to be in what systole
A number of string like structures is called___________ attached to the AV valves of the walls of the ventricles chord tendineae
The heart valve located between the right atrium and the right ventricle is called what tricuspid
What term refers to the volume of blood ejected from the ventricle during each heartbeat stroke volume SV
The amount of blood that one ventricle can pump in one minute is called _________ _______________ cardiac output CO
Blood returns from the lungs to the left ventricle through ____________ pulmonary veins (how many) 4
The first branches of the aorta are the coronary arteries
Place the following structures in order in relationship to blood flow through the heart Left atrium tricuspid valve right ventricle pulmonary vein aortic semilunar valve mitral valve Left ventricle pulmonary artery right atrium pulmonary semilunar valve
where is the pulmonary valve located b/t right venterical and pulmonary artery
where is mitral valve located left atrium and left ventricle
The heart pumps ____ blood into the _____ via the _________ arteries oxgen depleted lungs pulmonary
____are thicker chambers of the heart and sometimes called discharging chambers ventricles
Created by: knt5411