3 Circle the correct answer. O When you exercise, your muscles become / blood becomes bigger and stronger. 1 The heart/bone is a big muscle and it beats about 100,000 times a day. 2 The brain/Blood is red and it goes to all parts of the body. 3 The hearts/bones in your legs and arms are the longest in your body. 4 Do intelligent animals have a big brain/blood? 0/4
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1. The heart is a big muscle and it beats about 100,000 times a day.2. Blood is red and it goes to all parts of the body.3. The bones in your legs and arms are the longest in your body.4. Do intelligent animals have a big brain?5. When you exercise, your muscles become bigger and stronger.