14 - The Cardiovascular System Flashcards
What are the functions of blood?
Transport gases, nutrients, and hormones throughout the body tissues; remove waste products from the tissues; regulate the body’s pH; regulate the amounts of fluid present in the tissues; assist in regulating body temperature; and protect against pathogens.
The study of the heart and the circulatory system and it’s diseases and disorders.
Cardiology
What percent is the plasma in the blood?
55%
Plasma is composed of what percent of water?
90%
Regulates the blood pressure by functioning like a sponge to keep water in the vascular compartment to maintain plasma volume.
Albumins
Helps fight infection and transport a variety of substances.
Globulins
Causes blood to clot.
Fibrinogens
What percentage of blood is red blood cells?
40 -50%
Another term for red blood cells.
Erythrocytes
Another term for white blood cells.
Leukocytes
Cell fragments that contribute to blood clotting.
Thrombocytes
The process of blood clotting.
Coagulation
Another term for blood clot.
Thrombus
A blood clot that breaks free and moves through the vessel.
Embolism
The blood types depend on the presence or absence of what?
ABO antigens
The major vein draining the thorax and the head, ending at the right atrium.
Superior vena cava
A large venous trunk draining the lower extremities and the abdominopelvic region.
Inferior vena cava
The only veins that carries oxygenated blood from the lungs to the left atrium.
Pulmonary veins
A measurement of the volume of blood ejected from the heart per minute.
Cardiac output
The contraction phase of the cardiac cycle.
Systole
A contraction of the atrium.
Atrial systole
The pacemaker of the heart; it is the impulse-generating tissue that normally dictates heart rate.
Sinoatrial node (SA)
The largest artery in the body; it originates at the heart and branches into the extremities, the neck, and all the major organs; supplies oxygenated blood throughout the body.
Aorta
A heart valve that divides the left ventricle from the aorta.
Aortic valve
A vessel that carries blood away from the heart.
Artery
A structure located between the atria and the ventricles that conducts electrical impulses from the atria to the ventricles.
Atrioventricular node (AV)
One of the two upper (receiving) chambers of the heart.
Atrium
A pressure receptor on the inside walls of some arteries that is sensitive to stretching of the walls occurring from an increase in pressure.
Baroreceptor
The heart valve that divides the left atrium from the left ventricle. It has two flaps; also known as the mitral valve.
Bicuspid valve
A group of specialized cells that rapidly conduct electrical impulses down into the ventricles.
Bundle branch
The smallest blood vessel that contains oxygenated blood.
Capillary
The complete round of circulation from the time one event in the heart occurs until the instant when the same event occurs again.
Cardiac cycle
A measurement of the volume of blood ejected from the heart per minute.
Cardiac output
Referring to a slowing of the heart rate.
Cardioinhibitory
The A-B-C procedure to artificially return the heartbeat to normal. Establish an airway, provide ventilation to restart breathing, and perform chest compressions to reestablish circulation.
Cardiopulmonary resuscitation (CPR)
Cells that are specialized to rapidly spread the electrical signal through the myocardium.
Conduction pathway
The arteries that supply the heart with oxygenated blood.
Coronary arteries
An outlet that drains the five coronary veins into the right atrium.
Coronary sinus
The time it takes in between ventricular contractions for ventricular filling to occur; the phase during which the heart muscle relaxes.
Diastole
The innermost of the three layers of the heart wall.
Endocardium
The outermost of the three layers of the heart wall.
Epicardium
The number of beats per minute.
Heart rate