GIVING BRAINLIEST describe the function or job of each organ within the body

(WRITE IT IN UR OWN WORDS PLS :D)

Which part of cellular respiration must occur before any of the other steps can occur

The diagram shows a chicken embryo and a human embryo

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