Human Body Systems
Each subtopic includes About section, revision page link, 10 preview questions, and practice CTAs.
The Digestive System
SubtopicThe Digestive System under Human Body Systems for Grade 6 IGCSE.
Preview questions (no answers)
- 1.
If you are eating a piece of bread, where does the very first step of digestion take place?
A.In the stomach
B.In the mouth
C.In the esophagus
D.In the small intestine
- 2.
Which part of the digestive system finishes the breakdown of most nutrients?
A.Mouth
B.Esophagus
C.Small Intestine
D.Large Intestine
- 3.
What happens to the food that the body cannot digest or absorb?
A.It disappears
B.It is turned into fat
C.It becomes solid waste
D.It is turned into blood
- 4.
Which of these describes the gallbladder?
A.A large muscular pump
B.A long thin tube
C.A small sac-like organ
D.A hard bony structure
- 5.
Which of the following is the final destination for the small soluble molecules produced by digestion?
A.The kidneys to be turned into urine
B.The cells of the body for energy and growth
C.The large intestine to be turned into waste
D.The gallbladder for storage
- 6.
If an astronaut eats food while floating in zero gravity, will the food reach the stomach? Why?
A.No, because gravity is required to pull food down the throat
B.Yes, because peristalsis moves food regardless of gravity
C.No, because the stomach only opens when it feels the weight of food
D.Yes, because the air in the craft pushes the food down
- 7.
The esophagus is lined with which type of tissue to help push food along?
A.Bone tissue
B.Nervous tissue
C.Muscle tissue
D.Fat tissue
- 8.
During the process of ingestion, which structure prevents food from entering the trachea (windpipe)?
A.The Soft Palate
B.The Epiglottis
C.The Tongue
D.The Pyloric Sphincter
- 9.
Why is it important that the large intestine absorbs water?
A.To produce liquid waste that is easy to expel
B.To help the liver produce more bile
C.To conserve water for the body and solidify waste into feces
D.To ensure that the enzymes in the small intestine are not too diluted
- 10.
Which of these best describes the action of 'lipase'?
A.It breaks down fats into fatty acids and glycerol
B.It breaks down proteins into amino acids
C.It breaks down starch into glucose
D.It emulsifies large fat droplets into small ones
Download the worksheet for Human Body Systems - The Digestive System to practice offline. It includes additional chapter-level practice questions.
The Circulatory System
SubtopicThe Circulatory System under Human Body Systems for Grade 6 IGCSE.
Preview questions (no answers)
- 1.
The 'thumping' sound of a heartbeat is caused by what action?
A.Blood hitting the lungs
B.The heart valves closing
C.Air moving through the veins
D.Food moving through the arteries
- 2.
In the capillaries, what process allows nutrients to move from the blood into the body cells?
A.Freezing
B.Diffusion
C.Boiling
D.Melting
- 3.
Which gas is a waste product of our cells that the blood carries to the lungs to be removed?
A.B.C.D. - 4.
What is the name of the protein in red blood cells that helps them function, even though they don't have a nucleus?
A.Plasma
B.Hemoglobin
C.Glucose
D.Septum
- 5.
Which chamber of the heart does the 'Aorta' connect to?
A.Right Atrium
B.Right Ventricle
C.Left Atrium
D.Left Ventricle
- 6.
How does the circulatory system help the body maintain a constant temperature on a cold day?
A.It stops blood flow to the brain
B.It moves more blood to the skin's surface to release cold
C.It narrows blood vessels near the skin to reduce heat loss
D.It speeds up the pulse to create friction heat
- 7.
What is the role of the 'Pulmonary Artery'?
A.It carries oxygen-rich blood to the brain
B.It carries oxygen-poor blood to the lungs
C.It brings oxygenated blood back from the lungs
D.It is the main artery leaving the left ventricle
- 8.
Which of the following is NOT a transport function of the blood?
A.Carrying heat from the core of the body to the skin.
B.Carrying electrical impulses from the brain to the heart muscle.
C.Carrying hormones from the glands to the target organs.
D.Carrying glucose from the small intestine to the liver.
- 9.
What happens to the valves in the heart during the phase when the ventricles are contracting?
A.Atrioventricular valves open; semi-lunar valves close.
B.Atrioventricular valves close; semi-lunar valves open.
C.All four valves in the heart open to maximize flow.
D.All four valves in the heart close to build up maximum pressure.
- 10.
A blockage in a vessel leading to the brain causes a stroke. Which vessel was most likely blocked?
A.An artery
B.A vein
C.The vena cava
D.The pulmonary vein
Download the worksheet for Human Body Systems - The Circulatory System to practice offline. It includes additional chapter-level practice questions.
The Respiratory System
SubtopicThe Respiratory System under Human Body Systems for Grade 6 IGCSE.
Preview questions (no answers)
- 1.
Which of these is the correct chemical symbol for Oxygen?
A.B.C.D. - 2.
What happens to the pressure inside your chest when you inhale?
A.It increases
B.It decreases
C.It stays the same
D.It doubles
- 3.
What does the term 'pulmonary' refer to in science?
A.The heart
B.The lungs
C.The brain
D.The liver
- 4.
Why do humans need to breathe out carbon dioxide?
A.Because the body needs it for energy
B.Because it is a waste product that can be harmful if it builds up
C.To help the plants grow only
D.Because it makes us feel stronger
- 5.
Which of the following describes the membrane that surrounds and protects each lung?
A.Pleural membrane
B.Pericardium
C.Cell membrane
D.Diaphragm membrane
- 6.
Why does breathing rate remain high for a short period after exercise has stopped?
A.To provide extra oxygen to break down lactic acid (repaying oxygen debt)
B.To help the body cool down by losing heat through water vapor
C.To increase the amount of nitrogen in the blood for muscle repair
D.Because the diaphragm takes time to 'reset' to its resting position
- 7.
What is the term for the maximum amount of air a person can expel from the lungs after first filling the lungs to their maximum extent?
A.Vital capacity
B.Tidal volume
C.Residual volume
D.Total lung capacity
- 8.
Nicotine is a chemical found in tobacco smoke. What is its primary effect on the human body's systems?
A.It coats the alveoli and prevents gas exchange.
B.It is an addictive stimulant that increases heart rate and narrows blood vessels.
C.It causes the cilia to stop moving permanently.
D.It turns the lungs black and causes cancer.
- 9.
Which of the following describes the correct relationship between the volume of the thoracic cavity and air pressure during inhalation?
A.Volume increases Pressure increases Air is pushed out.
B.Volume decreases Pressure decreases Air is sucked in.
C.Volume increases Pressure decreases Air is pushed in by atmospheric pressure.
D.Volume decreases Pressure increases Air is sucked in.
- 10.
Why is cellular respiration considered a continuous process, even when we are sleeping?
A.Because the lungs never stop moving air.
B.Because cells require a constant supply of energy (ATP) to maintain basic life functions like heartbeat and brain activity.
C.Because the body needs to get rid of nitrogen throughout the night.
D.Because sleeping uses more energy than sitting quietly.
Download the worksheet for Human Body Systems - The Respiratory System to practice offline. It includes additional chapter-level practice questions.
Diet, Drugs, and Health
SubtopicDiet, Drugs, and Health under Human Body Systems for Grade 6 IGCSE.
Preview questions (no answers)
- 1.
Which of these is considered a 'recreational' drug rather than a 'medicinal' drug?
A.Painkillers
B.Antibiotics
C.Alcohol
D.Cough syrup
- 2.
What is the effect of exercise on a person's pulse rate (heart rate)?
A.The pulse rate decreases
B.The pulse rate increases
C.The pulse rate stops completely
D.The pulse rate stays the same
- 3.
Which of these food sources is known for being high in protein?
A.Butter
B.Lean meat and beans
C.Fruit juice
D.Sugar cubes
- 4.
Why is fiber important even though our bodies cannot digest it?
A.It provides energy for running
B.It helps clean the teeth
C.It helps food pass through the gut
D.It builds strong muscles
- 5.
The diagram illustrates the process of dental caries (tooth decay). Based on your knowledge of a balanced diet and hygiene, what is the identity of 'Substance X' and which food component is primarily responsible for its production?
A.Substance X is a vitamin; it is produced from fatty foods
B.Substance X is an acid; it is produced from sugary foods
C.Substance X is an alkali; it is produced from protein-rich foods
D.Substance X is a mineral; it is produced from high-fiber foods
- 6.
Why is it dangerous to drive after drinking alcohol?
A.It makes you see better at night
B.It slows down your brain's ability to process information
C.It makes you more focused on the road
D.It decreases the distance needed to stop
- 7.
What is the biological name for the 'energy' we measure in food?
A.Kilograms
B.Kilojoules
C.Kilometers
D.Kilovolts
- 8.
Which of these is a direct physiological result of long-term heavy alcohol consumption on the brain?
A.Increased volume of the cerebral cortex
B.Permanent shrinkage of brain tissue and loss of neurons
C.Improved memory and cognitive function
D.Conversion of brain tissue into muscle
- 9.
In the context of health, what is a 'deficiency disease'?
A.A disease caused by a viral infection
B.A disease caused by the lack of a specific essential nutrient in the diet
C.A disease caused by eating too much of a certain food group
D.A disease that is passed from parents to children through genes
- 10.
Why is it dangerous to consume high doses of 'fat-soluble' vitamins (A, D, E, K) compared to 'water-soluble' vitamins (B, C)?
A.Water-soluble vitamins are more toxic in small amounts
B.Excess fat-soluble vitamins are stored in the body's fat and liver rather than being excreted
C.Fat-soluble vitamins turn into sugar if not used immediately
D.Water-soluble vitamins cannot be absorbed by the body at all
Download the worksheet for Human Body Systems - Diet, Drugs, and Health to practice offline. It includes additional chapter-level practice questions.