| A | B |
| The cornea | protects the eye. When light strikes the cornea, it bends the incoming light onto the lens. |
| Tendons | are at each end of muscles and pull bones |
| The pupil is | a hole in the eye through which the light passes |
| A ligament | connects a bone to another bone. |
| Muscles | allow us to move. |
| The joints | are places between bones where we can bend. |
| The retina | converts the light rays into impulses. |
| The optic nerve | transfers impulses to the brain that translate them into images. |
| The iris | controls the amount of light reaching the retina. |
| The lens | further refocuses the light onto the retina. |
| refracting | means bending. |