Types of circulatory system 4.0 / 5 based on 1 rating ? BiologyHuman, animal and plant physiologyASOCR Created by: emily_wCreated on: 20-10-14 11:52 What is a double circulatory system? When there are two routes for blood to take--from the heart to the lungs and back, and from the heart to the body and back. 1 of 6 Why do mammals have double circulatory systems? They are more efficient; they require more energy due to their high activities; they have to maintain a 37°C body temperature 2 of 6 What is an open circulatory system? When the blood is in direct contact with body cells (insects) 3 of 6 What is a closed circulatory system? The blood is always within blood vessels (mammals) 4 of 6 What is a single circulatory system? Found in fish--blood can only go from the tissues to the heart to the gills and back to the tissues. 5 of 6 Why are fish suited to a single circulatory system? They don't need to maintain a body temperature and they don't need much energy because they don't do anything. 6 of 6
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