Digestive SystemDigestive SystemFunctions

_____________ - Break down food into the nutrients the body can absorb._____________- Take out nutrients out of the food we eat and deliver it to the cells in our body.____________ solid wastes that is not needed by the body

DigestionTwo Types

1. ________________-physically breaking down food.Examples __________, ___________, ________, Mash, Mix

2. ______________- using catabolic reactions and enzymes to break down food.

OrganizationAnd Pathway

1. Gastrointestinal (Gl) tract –Tube within a tube–Direct link/path between organs–Major Organs

___________Pharynx ____________ Stomach ____________ ___________ _______________ ____________ Rectum

2. Accessory organs–Not in tube path

Teeth ______________ ______________ Liver ______________ Pancreas

Digestion Begins

1. Mouth and 2. Esophagus

1. Mouth- Where digestion beginsTeeth- ______________________DigestionSalivary glands- _________________ Digestion of compounds such as starch.

a. Voluntary stage- Push food to back of _____________b. ___________________ stage- Raise Palatec. Esophageal stage- Contract pharyngeal muscles, open esophagus, start __________________

2. Esophagus- a. Secretes ____________b. Transports food to the _________________.

________________- Contractions of smooth muscles that push food down the digestive track

3. Stomach Function-1. Mixes Food- _____________ Digestion2. Reservoir- __________ food3. Starts chemical digestion of ___________, ___________, ___________.4. Destroys bacteria5. Absorbs

Food will leave the stomach as a soupy mixture called ___________________.4. Small Function-

Peristalsis

VeryAcidic!

Intestines Major site of _____________ digestion and ______________.

_____________- Increase the surface area of the small intestines for more absorption.Small Intestines

Accessory Organs

_____________- Creates bile that is used to break down fats.______________- Stores bile and releases it into the small intestines______________-Creates pancreatic juices that __________ the chyme

5. Large Intestines

6. Rectum

Function- To reabsorb ___________from digested wastes to make solid wastes.Chyme is __________ to form feces

Feces composition–______________–Inorganic salts–Epithelial cells–_______________–_______________ of digestion

Defecation–Peristalsis pushes feces into _______________–Rectal walls stretch until full.

Digestive Disorders

1. ____________________- Inflammation of the intestines.2. ____________________- Slow movement digestion causing a build up of bacteria.3. ____________________- watery feces causing dehydration.4. ____________________- inability to break down the amino acid phenylalanine.

Genetic disorder that is carried on the recessive allele.Use the word bank to fill each blank with the appropriate organ of the digestive system:

Esophagus Liver Stomach

Large Intestines Small Intestines

Salivary Gland Rectum

Anus Gal Bladder Pancreas

Mouth