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Unit 7 Digestive System
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The Digestive System
The Digestive System
• In this unit, we will discuss the body’s processing of food.
• This process prepares nutrients so that they can be used by each cell.
The Digestive System
-Body cells cannot absorb nutrients from food.
-Food must be changed into a substance that the body cells can use.
Cells cannot
absorb nutrients in
this Form.
The Digestive System
Digestion- The process of changing food into a usable substance.
Cells cannot
absorb nutrients in
this Form.
Digestion
The Digestive System
Digestion- The process of changing food into a usable substance.
Cells cannot
absorb nutrients in
this Form.
Digestion
Proteins, Fats,
sugars,
vitamins,
minerals
The Digestive System
Digestion- The process of changing food into a usable substance.
Cells cannot
absorb nutrients in
this Form.
Digestion
Proteins, Fats,
sugars,
vitamins,
minerals
The Digestive System
The Digestive System- is a very long muscular tube that begins at the mouth and ends at the anus.
Digestive
System
The Digestive System
The Digestive System- is a very long muscular tube that begins at the mouth and ends at the anus.
Digestive
System
The Digestive System
The Mouth and
Salivary
Glands
The Digestive System
The Mouth and
Salivary
Glands
The Digestive System
The Mouth and
Salivary
Glands
The Digestive System
The Mouth
The mouth is where food enters the body.
The Digestive System
The Mouth
The mouth is where food enters the body.
The Digestive System
The Mouth
The mouth is where food enters the body.
The Digestive System
The Mouth
The mouth is where food enters the body.
The Digestive System
The Mouth
The mouth is where food enters the body.
The Digestive System
The Mouth
The mouth is where food enters the body.
The Digestive System
The Mouth
The mouth is where food enters the body.
The Digestive System
Mechanical
Breakdown of
Food
The digestive process begins with the mechanical breakdown of food. The chewing, mashing, and
grinding of food by the teeth.
The Digestive System
Mechanical
Breakdown of
Food
The digestive process begins with the mechanical breakdown of food. The chewing, mashing, and
grinding of food by the teeth.
The Digestive System
Mechanical
Breakdown of
Food
The digestive process begins with the mechanical breakdown of food. The chewing, mashing, and
grinding of food by the teeth.
The Digestive System
Salivary
Glands
The salivary glands are located under the tongue, near the jawbone, and at the back of the throat.
The Digestive System
Salivary
Glands
The salivary glands produce one to two liters of saliva every day.
The Digestive System
Salivary
Glands
The salivary glands produce one to two liters of saliva every day.
The Digestive System
Salivary
Glands
Saliva is slimy, slippery, and wet. It helps prevent _________ when we swallow.
The Digestive System
Salivary
Glands
CHOKING!!!!!
The Digestive System
Salivary
Glands
Saliva is slimy, slippery, and wet. It helps prevent choking when we swallow.
The Digestive System
Salivary
Glands
The purpose of saliva is to help dissolve food and coat food with a mucus that allows it to pass through
the esophagus.
The Digestive System
The Mouth and
Salivary
Glands
The Digestive System
The Esophagus
The Digestive System
The Esophagus
The Digestive System
The Esophagus
The esophagus receives food and water from the mouth.
The Digestive System
The Esophagus
The esophagus receives food and water from the mouth.
The Digestive System
The Esophagus
The esophagus receives food and water from the mouth.
The Digestive System
The Esophagus
The esophagus receives food and water from the mouth.
Esophagus
The Digestive System
The Esophagus
The esophagus receives food and water from the mouth.
Esophagus
Mouth
The Digestive System
The Esophagus
The esophagus receives food and water from the mouth and sends it to the stomach.
Esophagus
Mouth
Stomach
The Digestive System
The Esophagus
The Digestive System
The Esophagus
The Digestive System
The Esophagus
The Digestive System
.
Stomach
The Digestive System
.
Stomach
The stomach receives food and water from the esophagus.
The Digestive System
.
Stomach
The stomach holds food until digestive juices have chemically broken down the food into chyme.
The Digestive System
.
Stomach
Chyme- a creamy semi-fluid mixture of food and digestive juices.
The Digestive System
.
Stomach
Chyme goes from the stomach to the___________.
The Digestive System
.
Small Intestine
Chyme goes from the stomach to the small intestine.
The Digestive System
.
Small Intestine
The small intestine is divided into three major regions: The Duodnum, jejunum, and ileum
The Digestive System
.
Small Intestine
The small intestine is divided into three major regions: The Duodnum, jejunum, and ileum
The Digestive System
.
Small Intestine
The Small intestine is about 20 feet long.
The Digestive System
.
20 foot shark
The Small intestine is about 20 feet long.
The Digestive System
.
20 foot shark
The Small intestine is about 20 feet long.
The Digestive System
.
20 foot shark
The Small intestine is about 20 feet long.
The Digestive System
.
Small Intestine
So why is the small intestine called the small intestine? Because of its length?
The Digestive System
.
Small Intestine
Its Diameter!!!!
.
.
Small Intestine
.
Small Intestine
.
Small Intestine
2.5-3 cm in diameter
Large Intestine
.
Small Intestine
2.5-3 cm in diameter
Large Intestine
.
Small Intestine
2.5-3 cm in diameter
Large Intestine
.
Small Intestine
2.5-3 cm in diameter
3 inches in diameter
Length on the other hand
.
Length on the other hand
.
Small Intestine
Length on the other hand
.
Small Intestine
Length on the other hand
.
Small Intestine
About 20 feet
in length.
Length on the other hand
.
Small Intestine
Large Intestine
About 20 feet
in length.
Length on the other hand
.
Small Intestine
Large Intestine
About 20 feet
long.
Length on the other hand
.
Small Intestine
Large Intestine
About 20 feet
long.
About 10 feet
long.
The Digestive System
.
Small Intestine
The small intestine is divided into three major regions: The Duodnum, jejunum, and ileum
The Digestive System
.
Duodnum
The first 10-12 inches of the small intestines is called the duodnum.
The Digestive System
. The duodnum receives juices from the pancreas
-It’s about 6 inches long
-Located behind the stomach
The Digestive System
. The duodnum receives juices from the pancreas, liver
-It’s about 6 inches long
-Located behind the stomach
-Largest solid organ in the body
- Produces bile
- Regulates the release of bile
From the gallbladder.
The Digestive System
. The duodnum receives juices from the pancreas, liver, and gallbladder.
-It’s about 6 inches long
-Located behind the stomach
-Largest solid organ in the body
- Produces bile
- Regulates the release of bile
From the gallbladder.-Pear Shaped
- When full it is 8 centimeters long
by 4 centimeters in diameter.
- Stores and releases bile.
The Digestive System
. The duodnum receives juices from the pancreas, liver, and gallbladder.
The Digestive System
. The duodnum receives juices from the pancreas, liver, and gallbladder.
The Digestive System
. The duodnum receives juices from the pancreas, liver, and gallbladder.
The Digestive System
. The duodnum receives juices from the pancreas, liver, and gallbladder.
The Digestive System
. The duodnum receives juices from the pancreas, liver, and gallbladder.
The Digestive System
. The duodnum receives juices from the pancreas, liver, and gallbladder.
The Digestive System
. The duodnum receives juices from the pancreas, liver, and gallbladder, which aid in further chemical
breakdown of the chyme. This final chemical breakdown is the completion of digestion.
The Digestive System
Digestion- The process of changing food into a usable substance.
Cells cannot
absorb nutrients in
this Form.
Digestion
Proteins, Fats,
sugars,
vitamins,
minerals
The Digestive System
.
Small Intestine
- The small intestine is the portion of the digestive system where the majority of nutrient absorption
occurs.
The Digestive System
.
Small Intestine
- The small intestine is the portion of the digestive system where the majority of nutrient absorption
occurs.
- The lining of the small intestine contains many small projections called villi.
Villi
The Digestive System
.
Small Intestine
- Food substances that are not absorbed are moved through the small intestines into the large intestines.
Large Intestine
The Digestive System
.
Large Intestine
-The large intestine receives food substances of little value to the body (feces).
The Digestive System
.
Large Intestine
-The large intestine receives food substances of little value to the body (feces).
- Water, minerals, and salts are absorbed.
The Digestive System
.
Large Intestine
-The large intestine receives food substances of little value to the body (feces).
- Water, minerals, and salts are absorbed.
- Feces move through the large intestine and are stored in the rectum.
The Digestive System
.
Large Intestine
-The large intestine receives food substances of little value to the body (feces).
- Water, minerals, and salts are absorbed.
- Feces move through the large intestine and are stored in the rectum.
Rectum
The Digestive System
.
Rectum
- Storage area for feces
The Digestive System
.
Rectum
- Storage area for feces
6-8 inches long
The Digestive System
.
Rectum
- Storage area for feces
The Digestive System
.
Rectum
- Storage area for feces
Anus
The Digestive System
.
Anus
- The anus is where fecal material is evacuated from the body.
The Digestive System
. - The anus is where fecal material is evacuated from the body.
The Digestive System
The Digestive System- is a very long muscular tube that begins at the mouth and ends at the anus.
Digestive
System
Mouth
Esophagus
Stomach
Small Intestine
Large Intestine
Rectum
Anus
