ACTIVITY 16

Question 1

ANIMALS

• mode of nutrition?

Answer 1

ingestive heterotrophic organisms

(incapable of manufacturing their own food)

Question 2

type of digestive system in animals?

• how many openings? + other term

Answer 2

COMPLETE DIGESTIVE SYSTEM

2 openings
1. mouth (oral cavity / buccal cavity)
2. anus (cloaca)

Question 3

the main organs of their DIGESTIVE SYSTEM form a ___ called the _____ ____ or the ____ _____

+ 7 functional regions in digestive system

Answer 3

• tube
• alimentary canal
• gastrointestinal tract

1. mouth
2. pharynx
3. esophagus
4. stomach
5. small intestine
6. large intestine
7. rectum

Question 4

4 composition of mouth

Answer 4

1. lips (surround cavity)
2. cheeks (side walls)
3. tongue (floor)
4. hard & soft palate (roof)

Question 5

main organ for mechanical breaking down of food?

+ what do u call this process
+ food becomes ___?
+ observed mostly in what vertebrates?

Answer 5

MASTICATION or TRUE CHEWING (process)
- by teeth
- “bolus”

• mammals

Question 6

4 different types of teeth?

Answer 6

1. incisors (biting, cutting, food stripping)
2. canines (seizing, piercing, tearing food
3. premolars (grinding and crushing)
4. molars (grinding and crushing)

Question 7

other term for swallowing?

• moves food from ____ to ____

Answer 7

deglutition

• mouth to stomach

Question 8

food passes thru esophagus (muscular, mucus-lined tube)
through muscle contraction called?

Answer 8

peristalsis