Can make their own food by chemosynthesis or photosynthesis


Must eat preformed organic nutrients



Ameba, Paramecium: Intracellular
Digestion inside a vacuole
Ameba engulfs by phagocytosis
Paramecium ingests through an oral groove


Both Intracellular And Extracellular within a gastrovascular cavity


Chemical in the intestine and phyiscal in gizzard. This very similar to birds.
Typhlosole in the intestine increases surface area for absorption into the blood


Chemicals are secreted from the Gastric Caeca in the stomach and from the salivary glands.
Physical with chewing and chitinous plates inside the gizzard.



Dissolving in saliva, chewing, tearing and ripping using the teeth.
This increases the surface area of the food
What is peristalisis ? The movement of food along the digestive tract.


Carbohydrate Begins with salivary amylase in the mouth

Protein Begins in stomach with gastric protease

Lipids Begins in small intestine with lipase

Remember the liver secretes bile and NO enzymes. Bile does help to emulsify fats by breaking them into small pieces.

Like the way dish detergent breaks up fat in the sink. This is a physical change.
The Villi are fingerlike projections in the small intestine that increase the surface area for absorbtion. By the time food gets to the large intestine digestion has been completed.

Label the parts of this villus. Know where the fatty acids and glycerol are absorbed. (lacteal) Also know where the amino acids and monosacharrides are absorbed. (cappilary)

Cool Youtube video on Villi

Open Ended Questions

Nutrition Explain how the salivary glands, stomach, pancreas, and liver aid in the process of digestion. (Use terms like hydrolysis, enzymes, and bile in your answer