Besides supporting you, your bones ____________the inside of your body.

Your bones are conected at ___________.

Elastic tissues called _______________ attach your muscles to your bones.

To move a part pf the body, one muscle tightens and its partner _________________.

Blood is made mainly of red blood cells, white blood cells, platelets, and __________.

Plasma helps the ___________ stay warm.

Red blood cells pick up ______ and take it back to the lungs.

When cells die at a wound or from disease, ___________carry them away.

Sticky threads made by ___________ help close up holes made by cuts or wounds.

The body makes blood cells inside the _____________.

The three main parts of the circulatory system are the blood, the heart, and _____________.

The heart is a special __________that pumps blood throughout the body.

The exchange of oxygen and carbon dioxide takes place in blood vessels called___________________.