Human Body Quiz – Printable Version
20 multiple-choice questions with an explained answer key, ready to print.
Print the sheet (or save it as a PDF from the print window), hand it out, then mark it together using the answer page: every answer is explained. Perfect for a party, a birthday, a classroom, a care home or a team activity.
Name: ………………………………Score: ……… / 20
- How many body hairs does a person have?
- A. 1 million
- B. 5 million
- C. 3 million
- D. 7 million
- How many red blood cells can be found in a single drop of blood?
- A. 5,000,000
- B. 70,000,000
- C. 10,000
- D. 200,000
- Which bone in the human body is barely larger than a grain of rice?
- A. the stapes (stirrup)
- B. the hallux sesamoid
- C. the incus (anvil)
- D. the malleus (hammer)
- What is the largest organ in the human body?
- A. The small intestine
- B. The brain
- C. The liver
- D. The skin
- About how many muscles does the human body have?
- A. 640
- B. 200
- C. 900
- D. 400
- Which is the only bone in the human body not joined to another bone?
- A. The hyoid bone
- B. The talus
- C. The coccyx
- D. The kneecap (patella)
- How long does it take to fully digest a complete meal?
- A. 5 to 6 days
- B. 2 to 4 h
- C. 24 to 72 h
- D. 6 to 8 h
- What is the role of the pineal gland?
- A. Produce insulin
- B. Digest lipids
- C. Produce white blood cells
- D. Regulate sleep
- How many lobes does the left lung have?
- A. 2
- B. 4
- C. 1
- D. 3
- Which nerve controls tongue movement?
- A. Hypoglossal nerve
- B. Vagus nerve
- C. Glossopharyngeal nerve
- D. Trigeminal nerve
- Which organ produces testosterone in women?
- A. Ovaries
- B. Uterus
- C. Pituitary gland
- D. Adrenal glands
- What element does myoglobin transport?
- A. Oxygen within muscle
- B. Zinc
- C. Calcium
- D. Magnesium
- How many pairs of ribs does a human normally have?
- A. 13
- B. 12
- C. 11
- D. 10
- What is the main role of fingerprints?
- A. Filtering bacteria
- B. Absorbing shocks
- C. Improving grip
- D. Regulating temperature
- What is the smallest muscle in the human body?
- A. The stapedius
- B. The buccinator
- C. The zygomaticus
- D. The corrugator
- How many baby teeth does a child have?
- A. 20
- B. 16
- C. 24
- D. 32
- What is the largest cell in the human body?
- A. The neuron
- B. The muscle cell
- C. The red blood cell
- D. The egg cell
- What is the average body temperature of a healthy adult?
- A. 41 °C
- B. 39 °C
- C. 35 °C
- D. 37 °C
- What is the role of the eardrum?
- A. Producing earwax
- B. Filtering low sounds
- C. Regulating blood pressure
- D. Transmitting sound vibrations
- Which is the most abundant element in the human body?
- A. Oxygen
- B. Nitrogen
- C. Carbon
- D. Hydrogen
Answer key — Human Body Quiz
- B. 5 millionMen, women, and children all have an average of 5 million hair follicles: 1 million on the head and 4 million on the body.
- A. 5,000,000The most commonly transfused blood products are red blood cells, platelets, and plasma.
- A. the stapes (stirrup)The stapes, also called the stirrup, is the third bone in the chain of three ossicles suspended in the middle ear by ligaments.
- D. The skinSkin is the largest organ in the human body, with about 2 square meters of surface area and a weight of 4 to 10 kg in an adult.
- A. 640The human body has about 640 skeletal muscles. They make up about 40% of body mass in men.
- A. The hyoid boneThe hyoid bone, located at the base of the tongue, is the only bone not directly joined to any other bone.
- C. 24 to 72 hComplete digestion of a meal — from ingestion to elimination — takes between 24 and 72 hours.
- D. Regulate sleepThe pineal gland secretes melatonin, a hormone that regulates circadian rhythms (sleep/wake cycle).
- A. 2The left lung is smaller to make room for the heart and has only two lobes.
- A. Hypoglossal nerveThe hypoglossal nerve is responsible for tongue movements.
- A. OvariesThe ovaries produce small amounts of testosterone in addition to estrogens.
- A. Oxygen within muscleMyoglobin stores and transports oxygen inside muscle fibers.
- B. 12The human ribcage is made up of 12 pairs of ribs, or 24 ribs total.
- C. Improving gripThe ridges of fingerprints increase friction and tactile sensitivity at the fingertips, which improves grip on objects.
- A. The stapediusThe stapedius muscle, located in the middle ear, is barely a few millimeters long.
- A. 20A child has 20 baby teeth, which start falling out around age 6 to gradually make way for the 32 permanent teeth.
- D. The egg cellThe egg cell (ovum) is the largest cell in the human body, visible to the naked eye, while the sperm cell that fertilizes it is one of the smallest.
- D. 37 °CThe average body temperature of a healthy adult is about 37 °C, with slight variations depending on the time of day and the individual.
- D. Transmitting sound vibrationsThe eardrum is a thin membrane that vibrates in response to sound waves and transmits these vibrations to the ossicles of the middle ear.
- A. OxygenOxygen is the most abundant.