What are the three terms used to describe a developing human inside the uterus? what determines each stage?

Brian said that when you get your body broken such as a arm or leg. it means your bones break to pieces and must do surgery or get a cast to fix it. is it true or false?

What do you generally see in a family when both parents are working?

When lifting heavy loads off the ground, the majority of the weight should be lifted by which of the following? a. arms b. legs c. back d. stomach