True or False. Write T if the statement is correct and F if it is wrong.
11. In breathing, it includes the two steps, inhalation and exhalation.
12. We can survive without food but we may die without oxygen even in a minute. 13. The human excretory system is composed of a set of organs responsible for taking in oxygen and expelling carbon dioxide.
14. The brain is the master organ of the nervous system and control center of the body.
15. Nerves are the basic units of the nervous system and known as nerve cells or neurons.
16. The skin protects the body from too much exposure to sunlight.
17. We should keep the musculoskeletal and integumentary system healthy by eating a well-balanced diet.
18. Digestive system absorbs water and nutrients from the food you eat.
19. The nails protect the sensitive tips of fingers and toes.
20. The skeletal system and digestive system are connected because they give shape to the body