| Human cells organize first into ____ and then into organs. |
bicuspids |
| The inside of the small intestine is lined with ____ projections. |
bronchi |
| Your brain, heart, stomach, and lungs are examples of ____. |
erythrocytes |
| Incisors, canines, ____, and molars are types of teeth. |
muscles |
| Red blood cells, also known as ____, deliver oxygen. |
organs |
| Your trachea divides into two main ____ that lead to your lungs. |
tissues |
| Your spine (backbone) is made of 33 bones called ____. |
vertebrae |
| Biceps and triceps are upper arm ____. |
villi |
