(BIOLOGY) The skeletal system

• How many bones are in the human adult skeleton?

  206 bones
• What are the three main components of bones

  1.Dense outer layer 2.Spongey inner layer 3.Bone marrow
• What is the function of bone marrow?

  Produces blood cells
• What are the four main functions of the human skeleton?

  1.protection 2.support. 3.blood cell production. 4.movement
• What is the role of bones in movement?

  Muscles are attached to bones, and joints help us to move