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Human Body Basics Part I Trivia Quiz

How much do you know about your body and how it works? This quiz is a sampling of facts about our bodies.

A multiple-choice quiz by jstagamtome. Estimated time: 4 mins.

Author
jstagamtome

Time
4 mins

Type
Multiple Choice

Quiz #
165,098

Updated
Dec 03 21

# Qns
10

Difficulty
Tough

Avg Score
5 / 10

Plays
12962

Awards
Top 35% Quiz

Last 3 plays: Guest 58 (5/10), Guest 67 (9/10), calmdecember (9/10).

One at a Time - Single Page - Timed Game

Question 1 of 10

1. Roughly what per cent of whole blood comprises the blood cells (reds, whites, and platelets)? The rest of the blood is plasma. Hint

22%

82%

62%

42%

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Question 2 of 10

2. Tears flow across the eyeball in which direction? Hint

From the temple side to the nose side

from bottom to top

from the nose side to the temple side

from inside the eyeball to the surface

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Question 3 of 10

3. What is the likelihood of being born with a single kidney? Hint

1 in one thousand

1 in ten thousand

1 in one hundred

1 in a million

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Question 4 of 10

4. Which of these organs is largest and heaviest? Hint

liver

spleen

heart

both kidneys

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Question 5 of 10

5. Which of the following organs cannot be successfully transplanted? Hint

brain

liver

kidney

heart

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Question 6 of 10

6. Which of the following organs is part of the lymphatic system? Hint

adrenal gland

lung

spleen

pancreas

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Question 7 of 10

7. Which organ "educates" part of the immune system in early life? Hint

thyroid gland

thalamus

parathyroid gland

thymus gland

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Question 8 of 10

8. Which of the following glands secretes the largest number of hormones? Hint

pituitary gland

pineal gland

thyroid gland

pancreas

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Question 9 of 10

9. How many main valves are in the heart? Hint

NEXT>

Question 10 of 10

10. The "visual cortex", the place where we actually see, is located where? Hint

brainstem

the back of the brain

top of the brain

right behind the eyes

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Most Recent Scores

Nov 11 2024 : Guest 58: 5/10
Nov 03 2024 : Guest 67: 9/10
Oct 25 2024 : calmdecember: 9/10
Oct 02 2024 : Guest 174: 6/10
Sep 22 2024 : Roger_Dwarf: 5/10

Score Distribution

Quiz Answer Key and Fun Facts

1. Roughly what per cent of whole blood comprises the blood cells (reds, whites, and platelets)? The rest of the blood is plasma.

Answer: 42%

One determines this by spinning blood in a test tube to determine the hematocrit, which is what the percent represents. Since cells are heavier than the liquid, they spin to the bottom. By far, most of the cells are red, and the contribution of the other cell types is negligible.

2. Tears flow across the eyeball in which direction?

Answer: From the temple side to the nose side

The lacrimal ducts are located near the outer side of the eyes and tears flow towards the middle, where they drain into the sinuses.

3. What is the likelihood of being born with a single kidney?

Answer: 1 in one thousand

Almost all people born with only one kidney lead comletely normal lives. Some don't find out until they try to donate one!

4. Which of these organs is largest and heaviest?

Answer: liver

The liver weighs about 1500 grams. The spleen weighs 150-250 grams. The kidneys' combined weight is about 280 grams, and the heart weighs up to 500 grams.

5. Which of the following organs cannot be successfully transplanted?

Answer: brain

Kidneys are the most successful complex organ transplanted (we won't count corneas).

6. Which of the following organs is part of the lymphatic system?

Answer: spleen

Other lymphatic organs are the lymph nodes, tonsils, and the correct answer to the next question.

7. Which organ "educates" part of the immune system in early life?

Answer: thymus gland

The thymus involutes by age 15. The thyroid and parathyroids are secretory glands and the thalamus is part of the brain. If you've ever eaten sweetbreads, they are thymus glands.

8. Which of the following glands secretes the largest number of hormones?

Answer: pituitary gland

Nine hormones secreted by the pituitary are known; seven from the front or anterior portion of the gland and two from the back or posterior pituitary.

9. How many main valves are in the heart?

Answer: 4

The heart has four chambers. Two valves are between the upper and lower chambers on each side of the heart and two valves are in the blood outflow tracts of the lower pumping chambers. No valves exist in the inflow tracts to the upper chambers. They fill passively as blood returns to the heart.

10. The "visual cortex", the place where we actually see, is located where?

Answer: the back of the brain

The posterior portions of the occipital lobes in the back of the brain house the visual cortex. Damage to that part of the brain can lead to total blindness, even if there is nothing wrong with the eyes.

Source: Author jstagamtome

This quiz was reviewed by FunTrivia editor crisw before going online.
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