Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Chapter 15
Vascular System
| Term | Definition |
|---|---|
| anastomosis | a natural connection between two vessels |
| arteries | blood vessels that carry blood away from the heart |
| arteriole | the smallest arteries; also called resistance vessels |
| baroreceptors | sensory nerve endings in the aortic arch and carotid arteries that sense changes in pressure |
| capillary | microscopic vessels that link arterioles to venules; site where nutrients, wastes, and hormones are exchanged between blood and tissue |
| circle of Willis | circle of arteries at the base of the brain |
| conducting arteries | the body's largest arteries; also called elastic arteries |
| diastolic pressure | pressure within arteries when the ventricle relaxes |
| diffusion | process by which molecules of a substance move from an area of higher concentration to lower concentration |
| distributing arteries | carry blood to specific organs and tissues; also called muscular arteries |
| filtration | process of removing particles form a solution by allowing the liquid portion to pass through a membrane |
| hypertension | blood pressure consistently higher than 140 mmHG systolic over 90 mmHg diastolic |
| peripheral resistance | resistance to blood flow resulting form the friction of the blood against the walls of the vessels |
| portal system | system of vessels in which flood passes through a capillary network, a large vessel, and then another capillary network before returning to the systemic circulation |
| pressure gradient | difference in pressure between two structures |
| sinusoid | large permeable capillary found in the organs such as the liver, spleen, and bone marrow that allows for the passage of large cells and proteins |
| systolic pressure | pressure in arteries when the ventricle ejects blood |
| tunica externa | outer layer of blood vessel; composed of strong, flexible, fibrous connective tissue |
| tunica intima | innermost layer of blood vessels; consists of simple squamous epithelium |
| tunica media | middle layer of blood vessels; composed of smooth muscle and elastic tissue |
| vasoconstriction | reduction in the diameter of a vessel |
| vasodilation | increase in the diameter of a vessel |
| veins | blood vessels that return blood to the heart; called capacitance vessels because of their capacity for storing blood |
| vena cava | the body's chief vein, which serves to return blood to the heart |
| venule | the smallest veins; serve to collect blood from the capillaries |
Created by:
lindstromjPN110
Popular Nursing sets