unit 2 lesson 4 digestion in the mouth. mechanical digestion: is the process of breaking down food...

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Unit 2 Lesson 4 Digestion in the Mouth

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Page 1: Unit 2 Lesson 4 Digestion in the Mouth. Mechanical Digestion: Is the process of breaking down food into smaller pieces. In the mouth, this is done by

Unit 2 Lesson 4

Digestion in the Mouth

Page 2: Unit 2 Lesson 4 Digestion in the Mouth. Mechanical Digestion: Is the process of breaking down food into smaller pieces. In the mouth, this is done by

Mechanical Digestion:

• Is the process of breaking down food into smaller pieces.

• In the mouth, this is done by our teeth breaking and tearing food into smaller pieces.

Page 3: Unit 2 Lesson 4 Digestion in the Mouth. Mechanical Digestion: Is the process of breaking down food into smaller pieces. In the mouth, this is done by

Chemical Digestion

• Is the process of breaking the chemical bonds in nutrients and changing those nutrients into simple forms that can be absorbed into the bloodstream.

• It breaks down the food we eat into something the bloodstream can absorb.

Page 4: Unit 2 Lesson 4 Digestion in the Mouth. Mechanical Digestion: Is the process of breaking down food into smaller pieces. In the mouth, this is done by

Mechanical digestion helps prepare food for

• Chemical Digestion

Page 5: Unit 2 Lesson 4 Digestion in the Mouth. Mechanical Digestion: Is the process of breaking down food into smaller pieces. In the mouth, this is done by

Chemical digestion is facilitated _________________

Page 6: Unit 2 Lesson 4 Digestion in the Mouth. Mechanical Digestion: Is the process of breaking down food into smaller pieces. In the mouth, this is done by

Chemical digestion is facilitated by enzymes.

Page 7: Unit 2 Lesson 4 Digestion in the Mouth. Mechanical Digestion: Is the process of breaking down food into smaller pieces. In the mouth, this is done by

Enzymes are __________produced by the body.

Page 8: Unit 2 Lesson 4 Digestion in the Mouth. Mechanical Digestion: Is the process of breaking down food into smaller pieces. In the mouth, this is done by

Enzymes are proteinsproduced by the body.

Page 9: Unit 2 Lesson 4 Digestion in the Mouth. Mechanical Digestion: Is the process of breaking down food into smaller pieces. In the mouth, this is done by

Amylase:

• A digestive enzyme that breaks down starch.

Page 10: Unit 2 Lesson 4 Digestion in the Mouth. Mechanical Digestion: Is the process of breaking down food into smaller pieces. In the mouth, this is done by

Saliva contains salivary ____________.

Page 11: Unit 2 Lesson 4 Digestion in the Mouth. Mechanical Digestion: Is the process of breaking down food into smaller pieces. In the mouth, this is done by

Saliva contains salivary amylase.

Page 12: Unit 2 Lesson 4 Digestion in the Mouth. Mechanical Digestion: Is the process of breaking down food into smaller pieces. In the mouth, this is done by

Salivary amylase:

• A digestive enzyme that starts the chemical digestion where starch is turned into a simple sugar.

Page 13: Unit 2 Lesson 4 Digestion in the Mouth. Mechanical Digestion: Is the process of breaking down food into smaller pieces. In the mouth, this is done by

Conditioned reflex for digestion in the mouth:

• This is when your mouth is conditioned to something that you associate with eating and it begins to salivate.

• To salivate means that your mouth fills with saliva (liquid produced by your salivary glands).

Page 14: Unit 2 Lesson 4 Digestion in the Mouth. Mechanical Digestion: Is the process of breaking down food into smaller pieces. In the mouth, this is done by

On average, how much saliva do we produce everyday?

• 1.5 liters

Page 15: Unit 2 Lesson 4 Digestion in the Mouth. Mechanical Digestion: Is the process of breaking down food into smaller pieces. In the mouth, this is done by

How many salivary glands to we have?

• 3 pairs (6 total)

Page 16: Unit 2 Lesson 4 Digestion in the Mouth. Mechanical Digestion: Is the process of breaking down food into smaller pieces. In the mouth, this is done by

What is a bolus?

• When food is chewed and mixed with saliva, it then turns into a moist ball.

• The moist ball is called bolus.

Page 17: Unit 2 Lesson 4 Digestion in the Mouth. Mechanical Digestion: Is the process of breaking down food into smaller pieces. In the mouth, this is done by

Where does digestion begin?

• Your mouth!!!!!!!!

Page 18: Unit 2 Lesson 4 Digestion in the Mouth. Mechanical Digestion: Is the process of breaking down food into smaller pieces. In the mouth, this is done by

What is the function of the epiglottis?

• Each time you swallow, the epiglottis closes the windpipe (trachea) so the food will go down the other tube in your throat (esophagus) to the stomach.

Page 19: Unit 2 Lesson 4 Digestion in the Mouth. Mechanical Digestion: Is the process of breaking down food into smaller pieces. In the mouth, this is done by

The trachea (windpipe) leads to where?

• The lungs

Page 20: Unit 2 Lesson 4 Digestion in the Mouth. Mechanical Digestion: Is the process of breaking down food into smaller pieces. In the mouth, this is done by

How many tubes do we have in our throats?

• 2

• 1 goes to the stomach (esophagus), the other goes to the lungs (trachea/windpipe).

Page 21: Unit 2 Lesson 4 Digestion in the Mouth. Mechanical Digestion: Is the process of breaking down food into smaller pieces. In the mouth, this is done by

The second organ of the digestive tract is the:

• Esophagus

Page 22: Unit 2 Lesson 4 Digestion in the Mouth. Mechanical Digestion: Is the process of breaking down food into smaller pieces. In the mouth, this is done by

The process of muscular contractions that push the food

down the esophagus is called?

• Peristalsis

Page 23: Unit 2 Lesson 4 Digestion in the Mouth. Mechanical Digestion: Is the process of breaking down food into smaller pieces. In the mouth, this is done by

The esophagus leads to what organ?

• The stomach

Page 24: Unit 2 Lesson 4 Digestion in the Mouth. Mechanical Digestion: Is the process of breaking down food into smaller pieces. In the mouth, this is done by

What is a sphincter?

• A sphincter is a ring of muscle that helps keeps food moving in one direction down the digestive tract.

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