Help with b please!!

Adigestive system that is a series of tubes beginning at the mouth and ending at the anus is a digestive system.

Modern computers can store about as much information as the human brain. true false its false i took the test

Abird flies by moving its wings up and down. which two systems are most directly responsible for the movement of a bird's wings? a. skeletal and muscular systems b. respiratory and muscular systems c. skeletal and digestive systems d. respiratory and digestive systems