The Human Body: Circulatory and Respiratory Systems
The Human Body: Circulatory and Respiratory Systems is one of 9 topics in the Grade 9 Natural Sciences CAPS syllabus, covered across 3 lessons on Study Vault. Below are real practice questions from this topic with full worked answers.
Sample practice questions
Easy
1. Which body system is responsible for producing body movement and protecting internal organs?
The musculoskeletal system
The excretory system
The nervous system
The digestive system
Answer: The musculoskeletal system — The musculoskeletal system produces body movement through muscle contraction and relaxation, while the skeleton protects internal organs.
Easy
2. Which body system removes waste from the blood and regulates the body's fluids?
The excretory system
The musculoskeletal system
The respiratory system
The reproductive system
Answer: The excretory system — The excretory system removes waste from the blood and regulates the body's fluids, with main components including the kidneys, bladder and ureters.
Medium
3. Name the body system whose main processes include hearing, seeing, feeling, tasting and smelling.
Answer: the nervous system — The nervous system receives information from the environment (hearing, seeing, feeling, tasting, smelling) and helps the body respond to stimuli.
