8th Grade-Chapter 3 Circulation
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Created by:
allsaintsscience on March 8, 2010
Subjects:
8th grade science-human biology
Classes:
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30 terms
Terms | Definitions |
|---|---|
 circulatory system | includes the blood, heart, and blood vessels |
| diffusion | movement of material from an area of high concentration to an area of low concentration |
| heart | controls blood flow though all parts of the body |
| atrium | upper chamber that receives blood from the body |
| ventricle | lower chamber that receives blood from the atrium |
| septum | divides and prevents the oxygen-rich and oxygen-poor blood from mixing in the heart |
| blood vessels | carries blood to every part of the body and is made up of the arteries, capillaries, and veins |
| artery | blood vessel that carries blood away from the heart and is where the blood is under the greatest pressure |
| vein | blood vessel that carries blood to the heart |
| capillaries | microscopic blood vessels that connect arteries to veins |
| blood pressure | force of blood on the wall of the blood vessels and is highest in arteries and lowest in veins |
| heartbeat | the rise and fall of blood pressure |
| aorta | largest artery in body-takes oxygenated blood to the body |
| valve | prevents blood from flowing backwards |
| platelets | cell fragments that help form blood clots |
| lymphatic system | system that transports tissue fluid though a network of vessels |
| hemoglobin | chemical in red blood cells that carries oxygen from lungs to cells and back to lungs with some carbon dioxide |
| lymph node | bean-shaped organ that filter out microorganisms and foreign material taken up by lymphocytes |
| lymph | tissue fluid that diffuses into the lymphatic capillaries |
| pacemaker | cluster of cells that controls heartbeat |
| cardiovascular system | what the heart, blood, and blood vessels make up |
| coronary arteries | arteries that supply blood to the heart itself |
| pulse | expansion and contraction of large arteries |
| atherosclerosis | the condition of when fat deposits build up on arterial walls |
| hypertension | high blood pressure |
| plasma | liquid part of blood |
| red blood cell | the cell that carries nutrients, minerals, oxygen, and wastes |
| white blood cell | the cell that fights viruses, bacteria, and other harmful organisms |
| Rh factor | a chemical identification tag in blood that is either positive or negative |
| sphygmomanometer | instrument for measuring blood pressure |
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