Cardiovascular System

Question 1

Autononomic nervous system (ANS)

Answer 1

Portion of the nervous system that regulates involuntary actions, such as heart rate digestion and peristalsis

Question 2

Leaflet

Answer 2

Flat, leaf shaped structure that comprises the valves of the heart and prevents back flow of blood

Question 3

Lumen

Answer 3

Tubular space or channel within an organ or structure of the body

Space within an artery vein intestine or tube

Question 4

Regurgitation

Answer 4

Backflow or ejecting of contenta through an opening

Question 5

Sphincter

Answer 5

Circular muscle found in a tubular structure or hollow organ that constructs or dilates to regulate passage of substances through an ta opening

Question 6

Vasoconstriction

Answer 6

Narrowing of the lumen of a blood vessel that limits blood flow, usually as a result of diseases medications or physiological processes

Question 7

Vasodilation

Answer 7

Widening of the lumen of a blood vessel caused by the relaxing of the muscle of the vascular walls

Question 8

Viscosity

Answer 8

State of being sticky or gummy