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Circulatory System--
blahalhal
| Question | Answer |
|---|---|
| What is the function of the Circulatory System? | -deliver oxygen and nutrients to all cells in body -remove waste products of cellular processes including CO2 -pathway for body fighting bacteria, hormones, chemical messengers -controls body temperature in warm blooded animals |
| What does simple transport rely on? | Diffusion, no special transport system ex. single celled: amoeba diffuse across membrane and cytoplasm ex. multi celled: jelly fish and hydra diffuse fluid with each cell |
| What are the two types of specialized transport? | open and closed transport |
| What is open transport? | organism's organs are bathed in blood. Have one blood vessel called aorta. |
| What is closed transport? | organism pumps blood through a network of blood vessels in the body. Blood moves in only ONE direction. |
| What are larger vessels for? | collect blood to pump |
| What are small vessels for? | distributing blood. tiny capillaries have a lot of surface area to exchange with cells |
| What is blood made up of and in % | 55% plasma, 44% red blood cells, 1% white blood cells |
| What does hemoglobin do in red blood cell? | carries the oxygen |
| The efficiency of closed transport depends on what 3 factors? | -composition of the blood -path of circulation -speed of the blood flow (blood pressure) |
| In a worm, what are the two main blood vessels? | -dorsal blood vessel (top) -ventral blood vessel (bottom) |
| Does a worm have a true heart? Explain | no true heart, but it has 5 pairs of pumps called aortic arches that pump blood. |
| Why does a worm have less pigment in its blood? | to have a higher carrying capacity for oxygen |
| How do invertebrates use the circulatory system? | muscular heart muscles pump blood past specialized respiratory surface before traveling to the rest of the body |
| What is the heart of a fish and what is the limitation? | -2 chambered heart -single circulation because deoxygenated blood is only pumped once through the body -limitation: slow blood flow (cold blood okay) |
| Describe the heart of amphibians and limitation. | -3 chambered -incomplete double circulation (mixing of deoxygenated and oxygenated blood) limitation: efficiency of blood is reduced by mixing (has lungs and skin to respire so its okay) |
| How many chambers and circulation do birds and mammals have? Advantages/Limits | -4 chambered -complete double circulation Advantage: maximizes blood pressure + warm blood Limitation: high energy required |
Created by:
bioger
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