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.
Our heart muscle is about the same size as...
1. a closed fist
2. a blueberry
3. our head
4. a $2 coin
The heart is about the size of a closed fist.
In which system of the human body do we find the enzymes that help process nutrients from food?
1. bones
2. digestive system
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.
What helps to maintain good posture?
1. skeletal muscles
2. quadriceps
3. nervous system
4. circulatory 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.
The cranium protects the brain.
1. true
2. false
The cranium protects the brain.
How many bones are in the human body?
1. 600
2. 192
3. 206
4. 210
The human skeleton contains 206 bones.
What is the first step of digestion?
1. Absorption of nutrients
2. The decomposition of food by saliva
3. Creation of enzymes
4. Blood circulation
It is the saliva in the mouth that begins to decompose food that is first chewed.
Which statement is true?
1. The left side of the brain controls the right side of the body.
2. The left side of the brain controls the left side of the body.
3. Both parts of the brain control both parts of the body at the same time.
4. The brain has no effect on either 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 heart beats around 35 million times per year.
1. false
2. true
The heart beats about 35 million times per year.
Where is bone marrow found?
1. bones
2. nervous system
3. heart
4. muscles
There is a cavity in the long bones of the body which is filled with a substance called bone marrow.
What can a muscle be compared to?
1. elastic tissue
2. concrete
3. a string
4. a tree branch