Bones contain three components that in itself make it strong and flexible. They are collagen, calcium phosphate, and living bone cells. Collagen gives bones their structure, calcium makes bones strong, and cells generate more bone cells to fill up weakened parts. Calcium intake from food supplements and milk are also good for the bones because it can strengthen them more and make the skeletal system protected from bone irregularities and problems while growing. Vitamin D is essential for the absorption of calcium in bones. In order to offer support to the muscles and tissues of the body, bone growth is very crucial, because a weak bone cannot make the body function well.
Answer:1. skeletal muscle
2. muscle
Explanation:
B. Old Stone Age.........................
I think it would be 1 and 5
i hopes this help...if it don't can you let me know the answer also cause i would like to know
Answer:
the physical environment includes Land air water plants and animals buildings and other infrastructure,in all of the natural resources that provide our basic needs and opportunities for social and economic development.
