14.Digestive System.notebook February 24, 2015

TODAY:

1. Quiz2. Lesson: The

DigestiveSystem

3. Game4. Homework

14.Digestive System.notebook February 24, 2015

Circulatory System Quiz /5

1. The circulatory system consists of three components. One is blood. What are the other two? (list them)

2. The circulatory systema) moves oxygen to the body tissues.b) moves nutrients to the body tissues.c) removes waste from the body tissues.d) none of the above.e) all of the above.

3. There are three types of blood vessels. One are veins. What are the names of the other two? (list them)

14.Digestive System.notebook February 24, 2015

Circulatory System Quiz ANSWERS /5

1. The circulatory system consists of three components. One is blood. What are the other two? (list them)-Blood vessels-heart

2. The circulatory systema) moves oxygen to the body tissues.b) moves nutrients to the body tissues.c) removes waste from the body tissues.d) none of the above.e) all of the above.

3. There are three types of blood vessels. One are veins. What are the names of the other two? (list them)-arteries-capillaries

14.Digestive System.notebook February 24, 2015

The digestive system takes in and digests food, then eliminates the remaining waste. It provides nutrients which the circulatory system delivers to body cells.

The digestive tract is the long, tubular portion of the of the digestive system that includes:• mouth• esophagus• stomach• small intestine• large intestine• anus

14.Digestive System.notebook February 24, 2015

THE DIGESTIVE TRACT

MOUTH ­teeth & tongue break food into smaller pieces (mechanical)

­water & chemicals in saliva softens food (chemical digestion)

ESOPHAGUS ­peristalsis (muscular contractions) moves the food down the esophagus to the stomach

STOMACH  ­chemicals & acids break down food ­muscular contractions assist is mixing of chemicals and food breakdown

INTESTINE ­moves food by peristalsis­most breakdown and absorption of nutrients occur in the small intestine­water is removed from remaining solid matter in the large intestine, forming feces, which leave the body through the anus.

14.Digestive System.notebook February 24, 2015

http://www.youtube.com/watch?v=s06XzaKqELk

14.Digestive System.notebook February 24, 2015

ACCESSORY ORGANS:

The following organs help in the digestion of food in our bodies:

LIVER ­makes digestive chemicals­produces bile, which helps break down fats

PANCREAS ­makes digestive chemicals­(also produces insulin which helps the body convert glucose/simple sugar into energy)

GALL BLADDER ­stores chemicals & bile from the liver until they're ready to be used in the digestive tract

14.Digestive System.notebook February 24, 2015

Accessory Organs

14.Digestive System.notebook February 24, 2015

FOOD ADDITIVES

Food additives are substances added to food during processing.

The are used in foods to improve• colour• flavour• texture• shelf life (freshness)

Many can be harmful to the body.

14.Digestive System.notebook February 24, 2015

https://www.youtube.com/watch?v=9libgB9cu14

14.Digestive System.notebook February 24, 2015

SENSITIVITIES

Sensitivities are unpleasant but usually not dangerous. People may be sensitive to lactose (milk sugar), fructose (fruit sugar), gluten, etc. The digestive systems of people with these sensitivities cannot process the food. Symptoms may include irritatibility in the bowels, headaches, nausea, and a general ill feeling.

14.Digestive System.notebook February 24, 2015

ALLERGIES

Allergies can be very dangerous because they cause the body to release harmful chemicals. The symptoms can include all those of food sensitivities plus:

• hives• rashes  &/or• swelling

Reactions can be fatal if the passageways of the mouth and throat swell.

Some common food allergies are peanuts, tree nuts, and shellfish.

http://www.brainpop.com/health/diseasesinjuriesandconditions/allergies/

14.Digestive System.notebook February 24, 2015

Homework:Check Your Learning #1,2,4,5,6 (pg. 99)