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Olympiad (Class 5) Human body and health — practice questions

Explore 64 free Human body and health questions in Olympiad (Class 5) Science. Open each question or exercise to read its content, reference answers and available explanation.

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Human body and health questions and exercises with answers

Showing questions 1–30 of 64.

Rice chewed for long starts to taste sweet. Which saliva substance changed its starch?Read the answer and worked solution →Which kind of tooth is mainly used for tearing tough food such as a piece of cooked meat?Read the answer and worked solution →Which part of a tooth is the hardest tissue in the whole body?Read the answer and worked solution →Which flap folds down while swallowing to guard the windpipe?Read the answer and worked solution →Which is another common name for the esophagus?Read the answer and worked solution →A person can swallow food even while standing on their head. Which action of the food pipe makes this possible?Read the answer and worked solution →Which acid is the main acid present in the juice made by the stomach?Read the answer and worked solution →The stomach makes strong acid. Why is its own wall not harmed?Read the answer and worked solution →About how much food can the stomach of a healthy adult normally hold?Read the answer and worked solution →What is the thick semi-liquid mixture of partly digested food that leaves the stomach called?Read the answer and worked solution →In which organ does most of the digestion of food take place?Read the answer and worked solution →Which is the first and shortest section of the small intestine?Read the answer and worked solution →Food waste stays 30 to 40 hours in which part of the gut?Read the answer and worked solution →Which organ is larger than the liver and is the largest organ of the body?Read the answer and worked solution →Where is bile stored until food that contains fat reaches the small intestine?Read the answer and worked solution →Bile helps the body deal with which nutrient by breaking it into tiny droplets?Read the answer and worked solution →After a sweet meal, which hormone made by the pancreas helps move glucose from the blood into the tissues?Read the answer and worked solution →Which organ is nicknamed the graveyard of red blood cells because it breaks down spent ones?Read the answer and worked solution →The food pipe of an adult is about how long on average?Read the answer and worked solution →On which part of the tongue are most taste buds found?Read the answer and worked solution →Why is the sense of taste useful for staying healthy?Read the answer and worked solution →How many pairs of main salivary glands does the human mouth have?Read the answer and worked solution →Chewing breaks food into tiny pieces. How does this help digestion?Read the answer and worked solution →Which muscular sheet separates the chest cavity from the belly cavity where most digestive organs lie?Read the answer and worked solution →Which pouch marks the join between the small intestine and the large intestine and carries the appendix?Read the answer and worked solution →Which part of the body is the first part of the gut, where digestion begins?Read the answer and worked solution →What is the name of the soft, smooth ball of chewed food mixed with saliva that is ready to be swallowed?Read the answer and worked solution →How many chambers does the human heart have?Read the answer and worked solution →Blood that is low in oxygen is pumped to the lungs from which side of the heart?Read the answer and worked solution →Oxygen-rich blood coming back from the lungs first enters which chamber of the heart?Read the answer and worked solution →

Worked practice questions

Rice chewed for long starts to taste sweet. Which saliva substance changed its starch?

  1. Lipase
  2. Bile
  3. Amylase
  4. Pepsin
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Correct answer: C. Amylase

Amylase in saliva breaks starch down into the simple sugar maltose, which is why chewed rice turns sweet.

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Which kind of tooth is mainly used for tearing tough food such as a piece of cooked meat?

  1. Canines
  2. Molars
  3. Incisors
  4. Wisdom teeth
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Correct answer: A. Canines

Canines are the pointed teeth built for tearing, while incisors cut and molars grind.

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Which part of a tooth is the hardest tissue in the whole body?

  1. Gum
  2. Enamel
  3. Dentin
  4. Pulp
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Correct answer: B. Enamel

Enamel covers the dentin of a tooth and is the hardest tissue in the human body.

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