Body systems

3. system includes the nose, mouth, throat, voice box, windpipe, and lungs.
5. bone which looks like a sponge, is inside compact bone.
6. enters the respiratory system through the nose or the mouth.
7. provide support for our bodies and help form our shape.
8. circulation carries blood from the heart to all the other parts of the body and back again.
10. muscle attached by cord-like tendons to bone, such as in the legs, arms, and face.
12. valve separates the right atrium from the right ventricle.
13. bone the solid, hard outside part of the bone.
15. dioxide passes into the alveoli to be exhaled.
16. joints don't move.
17. joints allow movement in one direction, as seen in the knees and elbows.

1. valve separates the right atrium from the right ventricle.
2. joints allow the greatest freedom of movement.
4. system is made up of blood vessels that carry blood away from and towards the heart.
9. in our bodies need oxygen to stay alive.
11. valve is between the left ventricle and the aorta, which carries blood to the body.
14. allow a rotating or twisting motion, like that of the head moving from side to side.