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Biology Ch.9.4 Terms

Transport Systems & Homeostasis

TermDefinition
Lymphatic System A network of glands and vessels that extends throughout your body. These glands and vessels contain a fluid called lymph. Coulourless, or pale yellow. Very similar to plasma.
Function of Lymphatic System Helps maintain the balance of fluids within the body. Lymph vessels are closely associated with blood vessels. Works with leukocytes in guarding the body against infection.
Circulation of Lymph No pump. Relies on surrounding muscle contractions. Vessels have valves to prevent backflow of lymph.
Blood Pressure Force exerted by circulating blood on the walls of blood vessels.
Systolic Pressure Generated by the contraction of the left ventricle as it forces blood out of the heart. (Minimum pressure)
Diastolic Pressure The pressure immediately before another contraction of the ventricles. (Maximum Pressure)
Hypertension Elevated blood pressure. Increases risk of stroke and heart disease. Caused by diet high in salt, cholesterol and/or stimulants.
Atherosclerosis Narrowing of the arteries due to deposit of cholesterol plaques on the inner layer of the walls of arteries. Results in decreased blood flow.
Angioplasty Fine plastic tube is inserted into clogged artery. A balloon is pushed out from the tip of the tube and inflated. Inflated balloon forces the vessel to open.
Coronary Bypass Removing a healthy blood vessel from another part of the body and using it to create a new pathway around a blockage in a blood vessel near the heart. Attaches to the aorta and to the blood vessel on the other side of the blockage.
Aspirin Prevents platelets from sticking together which reduces the formation of blood clots.
Created by: Inkina
 

 



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