List the organs food passes through from ingestion to elimination. (5 marks) Explain the difference between mechanical and chemical digestion. Give one example of each. (4 marks)

here are the answers to the questions:

Multiple Choice Questions:

12. Which chamber pumps oxygen-rich blood to the body?

    • d) Left ventricle

13. Blood pressure is highest in:

    • c) Arteries

14. White blood cells are responsible for:

    • c) Fighting infection

15. Platelets are important for:

    • c) Blood clotting

16. Which body system provides support and protection?

    • b) Skeletal

17. Which system controls and coordinates body activities?

    • b) Nervous

18. Hormones are produced by the:

    • b) Endocrine system

19. Which system helps defend the body against disease?

    • c) Immune

20. Which system works closely with the skeletal system to produce movement?

    • c) Muscular

PART B Thinking: SHORT ANSWER

21. List the organs food passes through from ingestion to elimination.

    • Food passes through the mouth, pharynx, esophagus, stomach, small intestine, large intestine, rectum, and anus.

22. Explain the difference between mechanical and chemical digestion. Give one example of each.

    • Mechanical digestion is the physical breakdown of food into smaller pieces without changing its chemical composition. An example is chewing food in the mouth.
    • Chemical digestion is the breakdown of complex food molecules into simpler nutrients using enzymes. An example is the digestion of proteins in the stomach by pepsin.