Chapter 21 - Digestion

Question 0

What are the four main stages of food processing

Answer 0

Digestion, ingestion, absorption, and elimination

Question 1

What are the three dietary categories of animals and what do each eat?

Answer 1

Herbivore - eats vegetation
Carnivore - eats meat
Omnivore - eats vegetation and meat

Question 2

What are the seven primary organs of the digestive system and what is the function of each?

Answer 2

Oral cavity - food
Esophagus - transport to stomach
Stomach - food storage
Small intestine - absorb 
Large intestine - concentrates waste 
Rectum - stores feces
Anus - waste

Question 3

What are the structures that assist digestion and how do they work?

Answer 3

Salivary glands - begins chemical breakdowns and moistens food
Gallbladder - stores bile
Liver - produces bile and helps with bile that breaks down fat
Pancreas - helps neutralize acid and produce digestion enzymes

Question 4

What is the purpose of digestion?

Answer 4

To gain nutrients for the body

Question 5

Describe the increasing complexity of the digestive system from the invertebrate animal to the vertebrate animal to the human.

Answer 5

Invertebrates - simple sack of enzymes, one opening
Vertebrates - esophagus, crop not as closed
Humans - stomach, intestines, crop, two openings