CARDIO-HA Flashcards
a highly complex, consisting of the
heart and a closed system of blood vessels
cardiovascular system
It is a hollow, muscular, four-chambered (left and right
atria, and left and right ventricles) organ located in the middle
of the thoracic cavity between the lungs in the space called the
mediastinum
Heart
what is the size of heart for men and women?
size of clenched fist
women - 255 g (9 oz)
men - 310 g (10.9 oz)
the anterior chest area that overlies
the heart and great vessels is called
precordium
what circulation does the right side of the heart do to pumps blood to the lungs for gas exchange?
pulmonary circulation
what circulation does the left side of the heart do to pump blood to all other parts of the body?
systemic circulation
what do you call to the large veins and arteries leading directly to and away
from the heart
great vessels
a large vein that carries blood to the heart from other areas of the body
vena cava
they are veins that return blood to the right = atrium from the upper and lower torso
superior and inferior vena cava
are the blood vessels that bring oxygen-rich blood from your heart to all of your body’s cells.
artery
transport deoxygenated blood from the right side (right ventricle) of the heart to the lungs for oxygenation
pulmonary artery
blood vessels that transfer freshly oxygenated blood from the lungs to the left atria of the heart
pulmonary veins
transports oxygenated blood from the left ventricle to the body
aorta
what are the 4 chambers of the heart
upper chambers: left and right atria
lower chambers: left and right ventricles
The right and left sides of the heart
are separated by a partition called
septum
which is thicker atria or ventricles?
ventricles
note: The thin-walled atria receive blood returning to the heart and pump blood into
the ventricles. The thicker-walled ventricles pump blood out of the heart. The left ventricle is thicker than the right ventricle because the left side of the heart has a greater workload.
what valve is located in at the entrance of ventricles?
atrioventricular valve
two types of av valve?
tricuspid valve and the bicuspid (mitral) valve.
it it is composed of three cusps, or flaps, and is located between the right atrium and the right ventricle
tricuspid valve
it is composed of two cusps and is located between the left atrium and the left ventricle.
bicuspid (mitral) valve
what collagen fibers anchor the AV valve flaps to papillary muscles within the ventricles
chordae tendineae
what valve is located at the exit of each ventricle at the beginning of the great vessels
semilunar valves
what are two types of semilunar valve
pulmonic valve
aortic valve
it is located at the entrance of the pulmonary artery as it exits the right ventricle
pulmonic valve
it is located at the beginning of the ascending aorta as it exits the left ventricle.
aortic valve
it is a tough, inextensible, loose-fitting, fibro-serous sac that attaches to the great vessels and surrounds the heart
pericardium
Serous membrane lining that secretes a small amount of pericardial fluid that allows for
smooth, friction-free movement of the heart.
Parietal pericardium
serous membrane covers the outer surface of the heart
epicardium
is the thickest layer of the heart, made up of contractile cardiac muscle cells
myocardium
is a thin layer of endothelial tissue that forms the innermost layer of the heart and is continuous with the endothelial lining of blood vessels
endocardium
is located on the posterior wall of the right atrium near the junction of the superior and inferior vena cava.
it inherits and generate impulse at a rate of 60-100 per minute
Sinoatrial node (SA Node)
located in the lower interatrial septum, slightly delays incoming electrical impulses from the atria and then relays the impulse to
the AV bundle (bundle of His)
Atrioventricular node (AV node)
peacemaker of the heart
SA node (sinoatrial node)
_______ are generated by the SA node and travel throughout the cardiac conduction circuit, can be detected on the surface of the skin. It can be also recorded through ___________ that records the depolarization and repolarization of the cardiac muscle.
- Electrical impulses
- Electrocardiography (ECG)
phases of ECG
P, Q, R, S. T
refers to the filling and emptying of the heart’s
chambers.
Cardiac cycle
what are the two phases of cardiac cycle
Clue: DRF | SCE
Diastole - relaxation of the ventricles known as FILLING (2/3 of the CC)
Systole - contraction of the ventricles known as EMPTYING (1/3 of the CC)