| Insulin and glucagon are ____ that regulate blood glucose. |
bicuspids |
| Your trachea divides into two main ____ that lead to your lungs. |
bronchi |
| Incisors, canines, ____, and molars are types of teeth. |
cartilage |
| Red blood cells, also known as ____, deliver oxygen. |
erythrocytes |
| Human cells organize first into ____ and then into organs. |
hormones |
| White blood cells, also known as ____, are needed for immunity. |
leukocytes |
| Humans have 20 primary and 32 permanent ____. |
teeth |
| The structure of your ears and nose is made of ____. |
tissues |
