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Human Body
Human Body Systems
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What is the water percentage of the human body?
0%
60%
0%
10%
0%
35%
0%
90%
Explanation
About 60% of the human adult body is made out of water. There are organs such as the brain and heart that are made of 73% water. Surprisingly (or not), the skin contains 64% water.
Where in the human body are there crystals that help us stand straight?
0%
The ear
0%
The legs
0%
The nose
0%
The heart
Explanation
The crystals help the human body to be sensitive to gravity and help to stand straight. If the ear is injured, the crystals can move to another part of the ear. If they fall out into the ear canal, they can cause dizziness.
What is the rarest human blood type?
0%
AB-
0%
A+
0%
O+
0%
O−
Explanation
AB negative is the rarest of the eight main blood types and just 1% of donors have it. The human body has four main blood groups (types of blood) – A, B, AB, and O. The human blood type and group are determined by the genes inherited from parents.
Where does the main digestion happen in the human body?
0%
Small intestine
0%
Kidneys
0%
Stomach
0%
Large intestine
Explanation
The food we eat is digested in the small intestine. It is softened by the juices, and the water, minerals, and vitamins are absorbed back into the blood in the colon of the large intestine. The intestine pushes the food forward to allow more digestion.
What human organ cleans fifty gallons of blood every day?
0%
Kidneys
0%
Heart
0%
Liver
0%
Stomach
Explanation
The kidneys clean & filter about 50 gallons of blood every single day. Around 1/2 to 2/3 of the waste products are transported by the blood and passed out of the body in urine.
What connects the muscles in the human body to the bones?
0%
Tendon
0%
Skin
0%
Veins
0%
Cartilage
Explanation
A tendon is a fibrous connective tissue that attaches muscle to bone. They are important for the movement ability by transferring the contraction energy produced by the muscles to the bone they hold.
What's the lifespan of a red blood cell of the human body?
0%
120 days
0%
5 years
0%
1 year
0%
30 days
Explanation
Human red blood cells are produced mainly in the bone marrow. They have an average life span of about 120 days.
Where can you be taller?
0%
Space
0%
Sea
0%
Desert
0%
Nowhere
Explanation
When the spine has no gravity power on it, the vertebra can extend and ease, letting astronauts truly get taller. However, once the astronauts are back on Earth, their original height returns to normal after a few months as the gravity of Earth is working again.
How many hairs does a human lose every day?
0%
100
0%
1000
0%
500
0%
5000
Explanation
It's quite common to shed about 100 hairs a day. When the body drops significantly more hairs each day, it's a medical condition that is called is telogen effluvium. It usually happens after stress, a shock, or a traumatic event.
Which of the following has more bones?
0%
Baby
0%
Adult Man
0%
Adult Woman
0%
All have the same amount
Explanation
An adult human has 206 bones, but a newborn baby has almost 300 bones in their body. This is because babies have more flexible cartilage (a firm tissue that’s softer than bone) in the body. As the newborn grows, some of the cartilage converts to bones and some bones fuse.
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