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The Skeletal System And Muscular System

The skeletal system and muscular system

The skeletal system has 206 bones. And the joints between bones allow movement. The skeleton provides the framework witch supports the body and maintains its shape.And the muscular system moves the body.The skeletal system has a soft, inside that is part of the bone is called the marrow. The muscular system moves the body. The muscles move by contracting , or becoming shorter. when the heart muscles relax , blood from it enters the heart. the muscles quickly tighten up to squeeze the blood back again. The actin is called a heart beat. The heart beats about 70 times each minute. The skeletal system is also the bone of the body.

information and pictures taken from world book kids and world book student.