Ineed with these question can u pl.

19. The human respiratory system is a series of organs responsible for taking in oxygen and expelling carbon dioxide.

20. nose, mouth, pharynx, larynx, trachea, bronchi, and lungs

21. Can't answer

22.Digestion is the breakdown of food into small molecules, which are then absorbed into the body.

23. mouth, esophagus, stomach, small intestine, large intestine

24. Don't Know

think about the oscillation of the toy shown in the video. when the toy is at the highest point of its motion, its velocity is zero and its acceleration is negative.