1) What bones protect the heart and lungs ? a) the ribcage b) the skull c) the pelvis 2) A broken bone is called a _____. a) joint b) fracture c) sprain 3) What do we call the place where two bones meet? a) spine b) muscle c) joint 4) Red blood cells are made in the _____ of bones. a) bone marrow b) skull c) ends 5) There are ____ bones in the human skeletal system. a) 100 b) 206 c) 350 6) The bones that protect the brain are called the ____. a) spine b) skull c) pelvis 7) Bones are made of calcium and phosporus. When they have less calciumm they are weak and can break easily. This is called __ . a) Osteoporosis b) Diabetes c) Sprain

Skeletal System

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