Circulatory, Respiratory, Digestive
What does the respiratory system do in cellular respiration? (2 things)
- takes in oxygen
- expels carbon dioxide & water vapor
What 2 molecules are exhaled?
carbon dioxide and water vapor
What molecule never gets digested or absorbed?
Fiber
What happens to large molecules in the digestive system?
They get digested (broken down)
What is an open system?
What does the digestive system do in cellular respiration? (2 things)
- breaks down food
- absorbs food into the bloodstream
What molecule is inhaled?
The smallest units of life; in the small intestine, they act as doors to allow food into the bloodstream.
What are cells?
These sized molecules are absorbed in the small intestion.
What are small molecules?
Matter remains stable in this system.
What is a closed system?
What does the circulatory system do in cellular respiration?
- transports food & oxygen molecules to the cells
- transports CO2 and H2O molecules back to the lungs
all over the body!
What are villi?
The fiber molecule is too big and complex.
What does your body do with food that you don't need right away for energy?
it gets stored as fat
the lungs are part of the....
respiratory system
small food molecules are absorbed here (2 places)
small intestine
large intestine
Any material that can react with other substances to produce energy. Can be food or non-food.
What happens to small molecules in the digestive system?
they get absorbed
What are the three ways your body uses food?
1. for energy right away
2. fat storage to use later
3. for growth
the heart, veins, and arteries are part of the...
circulatory system
Large food molecules are broken down here (3 places)
mouth
stomach
small intestine
The name of the procedure in which a doctor feeds a camera on a tube down the throat to take pictures of the inside of the body.
What is an endoscopy?
The process of molecules crossing the walls of the small intestine.
What is absorption?
What 2 pathways for food molecules would a bear in hibernation use?
1. Needed for energy right now.
2. Not needed for energy right now (stored as fat).