Which system helps get rid of some kind of waste

Aduty of the adult assigned to supervise a group of children is to a. check on the children at least every 20 minutes. b. keep the children within earshot. c. give the children a list of "don'ts" concerning behavior. d. conduct a name-to-face check when transitioning to the playground

Adisease in which scar tissue replaces healthy liver tissue

What is a common risk associated with alcohol?