Layer C, Task 6

Question 1

Function of the crop and gizzard in an earthworm

Answer 1

Crop: stores food
Gizzard: Grinds food to break into pieces

Question 2

Digestive system

Answer 2

Made up of digestive tract and accessory organs

Question 3

Parts of the digestive tract

Answer 3

Mouth, esophagus, stomach, intestine (small & large)

Question 4

The digestive system has the ability to complete 4 major tasks:

Answer 4

1. Ingestion
2. Digestion
3. Absorption
4. Elimination

Question 5

Mouth

Answer 5

Breaks down food
- Mechanically (with teeth & tongue)
- Chemically (saliva contains enzymes that break down the food molecules)

Question 6

Esophagus

Answer 6

Muscular tube connecting mouth to stomach
Smooth muscle tissue contracts & relaxes (peristalsis) to move the food along

Question 7

Stomach

Answer 7

Holds and churns food
- Chemical digestion (gastric juices, stomach lining has cells that produce enzymes & acids)
- Mechanical digestion (Smooth muscle tissue contracts to mix the stomach contents)

Question 8

Chyme

Answer 8

Resulting substance after the churning of the substance

Question 9

Sphincters

Answer 9

Separates stomach from esophagus and intestines

Question 10

Small intestine

Answer 10

Where most digestion occurs
Goblet cells release mucus and nutrients diffuse through wall of small intestine

Question 11

3 parts of the small intestine

Answer 11

Duodenum
Jejunum
Ileum

Question 12

Large intestine

Answer 12

Lining absorbs water from indigestible food
Remaining solid matter excreted as feces

Question 13

Accessory organs

Answer 13

Help digest food by supplying enzymes
Liver, gallbladder, pancreas

Question 14

Liver

Answer 14

Largest internal organ, produces bile (helps break down lipids)

Question 15

Gallbladder

Answer 15

Stores the bile

Question 16

Pancreas

Answer 16

Produces insulin, an enzyme that regulates the concentration of glucose in the blood

Question 17

Name 1 disorder that involves the digestive system

Answer 17

• Celiac disease (issue with small intestine)
• Diverticulitis (issue with large intestine)
• Heartburn (issue with contents from stomach entering esophagus)