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