alleryStart learning →In a human, blood always stays inside the heart and vessels. Such a system is called:
AAn open system
BA closed system
CA single system
DA lymphatic system
Answer & Solution
Correct answer: B. A closed system
Blood that never leaves its vessels is the defining feature of a closed circulatory system.
Keep practising Transportation in plants and animals
Browse all Transportation in plants and animals questions for Olympiad (Class 7), or explore more Science topics.
Related questions
In birds and other non-mammal vertebrates, which cells carry out clotting?Which free-floating cells in insect hemolymph help defend against germs?In an arthropod, hemolymph is drawn back into the heart through which openings?Which valve lies between the right atrium and the right ventricle?What is the benefit of a double circulation with a four-chambered heart?Why do large animals need a circulatory system?A crop has a transpiration ratio of 500. How much water is transpired for 2 kg of dry mattWhy does transpiration cool a plant?