Digestion in Animals

Nutrition in Animals

Organs of Digestive System

Multiple Choice

1.The first step of nutrition is ______________.

• a. Digestion

• b. Ingestion

• c. Excretion

• d. Absorption

Multiple Choice

In which of the following organs, no digestion occurs.

• a. Oesophagus

• b. Small intestine

• c. Buccal cavity

• d. Stomach

Multiple Choice

Which of the following food items will not show a positive iodine test for starch?

• a. A slice of potato

• b. Cooked rice

• c. Mustard oil

• d. A slice of bread

Learning Objective

List the organs associated with the digestive system of human beings.

Explain the role of mouth, tongue and teeth in digestion.

Breakout Room Activity

Create a mind map to list the parts of digestive system. You can use bubble.us, draw.io or any other app.

Open Ended

Enzyme that breaks starch into simple sugars ___________

Open Ended

Another name for the temporary set of teeth in human beings _______________

Open Ended

Organisms found in plaque _________

Open Ended

Glands that secrete digestive juice in the mouth ___________

Challenges

• Archimedes: Name the various kinds of teeth in our mouth. State their functions.

• Newton: Explain how the mouth helps with the digestion of food.

• Pasteur: Discuss the role of tongue in our digestive tract.

• Darwin: A slice of bread gives a positive iodine test. However, if the slice is thoroughly chewed, the test is negative. Explain giving reasons.

Multiple Select

Carbohydrates are broken down into

• a. glucose

• b. fatty acids

• c. glycerol

• d. amino acids

Multiple Select

Permanent teeth contain ________ molars in each jaw.

• 12

• 0

• 6

• 8

Multiple Select

________________ are for biting and cutting food in humans.

• a. Incisors

• b. canines

• c. molars

• d. Premolars

Multiple Select

The enzyme --------------------is present in saliva.

• a. amylase

• b. pepsin

• c. insulin

• d. rennin

Reinforcement Activity

Design an experiment