| A | B |
|---|
| Vein | This blood vessel carries blood to the heart |
| Brain | The control center of your nervous system. |
| Organ | This is formed from tissues of different kinds working together. |
| Cardiac muscle | This muscle makes up the heart. |
| Spinal cord | Connects nerves in your body to your brain. |
| Esophagus | Tube that goes from your mouth to your stomach. |
| Nerves | These connect the sense organs in your head to your brain. |
| Stomach | Food is liquified in this organ. |
| Small intestine | Food is digested the most here and taken into the body. |
| Neurons | These cells are the basic unit of the nervous system. |
| Large intestine | Water is removed from digested food here. |
| Tissue | Cells of the same type form this. |
| Smooth muscle | Type of muscle found in the walls of your organs. |
| Cell | The basic building block of the body. |
| Capillary | This kind of blood vessel is the smallest. |
| Striated muscle | This kind of tissue makes up the muscles in your arms and legs. |
| Lungs | These organs take oxygen into your body. |
| Heart | This organ pumps blood throughout your body. |
| Artery | This blood vessel carries blood away from the heart. |
