| A | B |
|---|
| accurate | careful; free of mistakes or errors |
| circulate | to move around in a loop or circle |
| hollow | empty inside |
| appendages | a body part that sticks out |
| determined | reached a firm decision to do something |
| invulnerable | safe or protected; opposite of vulnerable |
| breakthrough | a sudden, important change that allows for progress |
| expand | to get bigger |
| posture | the way in which someone holds or carries their body |
| cast | a hard covering that holds a broken bone in place while it heals |
| flexible | bendable |
| vulnerable | weak or in danger |
| cells | the smallest units that make up living things and are microscopic |
| flinch | to draw back suddenly, which is an example of a reflex |
