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Biology Ch.9.4 Terms
Transport Systems & Homeostasis
| Term | Definition |
|---|---|
| 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. |
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Inkina
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