In the digestive system, which happens first, digestion or absorption? Explain
Digestion. It breaks food down into nutrients small enough for your body to absorb.
Does the digestive system absorb all the nutrients you need?
Yes
What does the body do with nutrients it doesn't need?
The body stores the extra nutrients as fat and we gain weight.
What substance do the salivary glands produce?
saliva
The _____ separates the lungs from the abdomen.
trachea
diaphragm
nasal passages
Air enters and leaves the respiratory system though the_____.
trachea
diaphragm
nasal passages
The _____ is a tube that takes air to the lungs.
trachea
diaphragm
nasal passages
What type of blood vessel transports blood from the organs to the heart.
veins
What is the purpose of the circulatory system?
It transports nutrients and oxygen to cells in all parts of the body and carries waste substances so they can be expelled.
Which blood cells transport oxygen?
red blood cells
