17796699
Descripción
Fichas por Sam Gunnell, actualizado hace más de 1 año
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Creado por Sam Gunnell
hace más de 5 años
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| Pregunta | Respuesta |
| What three features make an effective transport system? | - A fluid to transport stuff eg: oxygen (blood) - A pump to create pressure to push the fluid around the body (heart) - An exchange surface to enable O2 or other stuff to enter and leave the blood |
| In what two ways can efficiency be improved? | - Tubes/vessels to carry blood - Two circuts, one to pick up O2 and one to take it to tissue |
| What is a closed system? | Where blood is enclosed in vessels |
| What is an open circulatory system? Give an example of an animal that has an open circulatory system | Blood isn't contained in vessels but fill cavities Insects |
| How do insects transport blood around their bodies? | The heart pumps blood into haemocoel (blood space) |
| How does oxygen get around insects bodies? | They have a system of tubes called trachea with openings called spiracles |
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