The Amazing Human Body
Where is bone marrow found?
1. nervous system
2. bones
3. heart
4. muscles
There is a cavity in the long bones of the body which is filled with a substance called bone marrow.
The heart beats around 35 million times per year.
1. true
2. false
The heart beats about 35 million times per year.
Our heart muscle is about the same size as...
1. a $2 coin
2. our head
3. a blueberry
4. a closed fist
The heart is about the size of a closed fist.
How many bones are in the human body?
1. 206
2. 210
3. 192
4. 600
The human skeleton contains 206 bones.
In which system of the human body do we find the enzymes that help process nutrients from food?
1. digestive system
2. bones
3. muscles
4. nervous system
In the digestive system, the liver creates different enzymes to help treat the food nutrients which are picked up in the small intestine.
There are the same number of nerve cells in the brain as there are stars in the Milky Way.
1. false
2. true
There are MORE nerve cells in the brain than stars in the Milky Way.
What helps to maintain good posture?
1. quadriceps
2. circulatory system
3. skeletal muscles
4. nervous system
Skeletal muscles work nonstop, without one even noticing, to control posture (position of the body)
Food needs about 2 to 3 hours to travel through the entire digestive system.
1. true
2. false
Food needs one or two days to get through the entire digestive system.
What is the first step of digestion?
1. Absorption of nutrients
2. Blood circulation
3. The decomposition of food by saliva
4. Creation of enzymes
It is the saliva in the mouth that begins to decompose food that is first chewed.
What can a muscle be compared to?
1. a tree branch
2. a string
3. concrete
4. elastic tissue
Muscles are all made of the same material, a type of elastic tissue (similar to a rubber band).
Which statement is true?
1. The brain has no effect on either side of the body.
2. The left side of the brain controls the right side of the body.
3. Both parts of the brain control both parts of the body at the same time.
4. The left side of the brain controls the left side of the body.
The left side of the brain controls the right side of the body and the right side of the brain controls the left side of the body.
The cranium protects the brain.
1. true
2. false