In your Grade 4 Science, you have learned the major organs of the body and how these organs work together to make the body function properly. You have also learned that plants and animals have body structures that help them survive in their particular habitat. In the succeeding lessons, you will learn that the organs of the body are organized into different systems that perform specific functions.
The skeletal system serves as the framework of the body. Its major functions are body support, facilitation of movement, protection of internal organs, storage of minerals and fats, and blood cell formation.