OCR Biology AS- Transport in Animals
About this set
Created by:
03harmal on January 10, 2010
Subjects:
Biology, Exchange and Transport
Description:
Transport in animals,
The mammalian Heart
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19 terms
Terms | Definitions |
|---|---|
 Why Multi Cellular organisms need Transport Systems- | Need large supplies of Oxygen and Nutrients, and need to remove waste. Size means the cells are not surrounded by whatever they need, so there must be a way of getting these things to the required cells. |
| Transport | the movement of oxygen, nutrients, hormones, waste & heat around the body |
| Single Circulatory System | Flows through the heart once per cycle, less efficient |
| Double Circulatory System | flows through the heart twice per cycle, more efficiant |
| Features of an effective transport system- | fluid/medium to carry nutrients/oxygen, pressure creating pump for movement, exchange surfaces. |
| pulmonary circulation | flow of blood from the heart to the lungs and back to the heart |
| systematic circulation | flow of blood from the heart to the body and back to the heart |
| Aorta | blood pumps through to the body. |
| Atria | very thin muscles, top chambers of hear, push blood into ventricles. |
| Coronary Arteries | lie over surface of heart, oxygenating the heart as a muscle. |
| Ventricle | Bottom chambers of the heart. Left- 2-3x thicker-> pumps blood out of aorta to the body. Right-> thinner, pumps deoxygenated blood to lungs |
| Vena Cava | Either of the 2 large veins carrying deoxygenated blood from body to the heart. |
| Heart | muscular pump that creates pressure to propel blood through the arteries and around the body. |
| Tendinous Chords | Attached to walls of the ventricle, stop valves turning inside out. |
| Atrioventricular Valves | between the atria and ventricles |
| Pulmonary Vein | carrying oxygenated blood from lungs to the left atria. |
| Angina | restricted blood flow to the heart, reducing oxygen/ nutrient levels supplied to the heart, |
| Septum | wall of muscle separating Ventricles |
| Semilunar Valves | at the base of major arteries |
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