How is the lymphatic system similar to a drainage system?

What is an important step to prove something is valid or not? determining the reliability observing research testing

How does the endocrine system affect the body's functions? o o o o it secretes enzymes directly into the bloodstream. it secretes hormones directly into the bloodstream. it secretes enzymes through ducts to the surface of organs. it secretes hormones through ducts to the surface of organs.

Many dental offices prefer preset trays because the use of these trays or what