Human Body Systems Digestive System

Views:
 
Category: Education
     
 

Presentation Description

Details of the process of Digestion

Comments

Presentation Transcript

Human Body System:

Human Body System Digestive System

Slide 2:

And the digestive system will be busy at work on your chewed-up lunch for the next few hours — or sometimes days, depending upon what you've eaten. This process, called digestion, allows your body to get the nutrients and energy it needs from the food you eat.

Slide 4:

So let's find out what's happening to that, CHOWMIN, Pizza, Orange, and Milk!!!!

The Mouth:

The Mouth The Mouth Starts Everything Moving The mouth is the first portion of the A limentary canal that receives food and saliva .

Mouth ( Closed & Opened):

Mouth ( Closed & Opened)

The First Step: Ingestion:

The First Step: Ingestion The taking of food into mouth is known as Ingestion

The First Step: Ingestion :

The First Step: Ingestion The tongue and teeth are the first specialists in the task. The tongue is in charge of tasting and positioning the food, which is cut and ground by the teeth .

Mouth – Its inside:

Mouth – Its inside

Tongue:

Tongue

Teeth : the chewing organ:

Teeth : the chewing organ

Slide 14:

When you do eat, the saliva breaks down the chemicals in the food a bit, which helps make the food mushy and easy to swallow.

Slide 15:

Your tongue helps out, pushing the food around while you chew with your teeth. When you're ready to swallow, the tongue pushes a tiny bit of mushed -up food called a bolus (say: bow- lus ) toward the back of your throat and into the opening of your esophagus , the second part of the digestive tract.

On the Way Down:

On the Way Down 10inches (25 cm) IS THE LENGTH OF THE ESOPHAGUS. It moves food from the back of your throat to your stomach.

Slide 20:

Once food has entered the esophagus, it doesn't just drop right into your stomach. Instead, muscles in the walls of the esophagus move in a wavy way to slowly squeeze the food through the esophagus. This takes about 2 or 3 seconds.

Slide 21:

Esophagus & Stomach

Slide 22:

The part of the digestive tract that is a continuation of the esophagus. It is sometimes thought of as an expansion of the esophagus. It is the first section of the digestive system that is located in the abdomen.

Slide 23:

It has the shape of an empty bag that is curved somewhat like a bagpipe, the handle of an umbrella, or the letter “J.”

Slide 24:

In the stomach, gastric juices and enzymes subject the swallowed food to intense chemical reactions while mixing it completely .

Stomach Wall Layers:

Stomach Wall Layers

Stomach Wall:

Stomach Wall

Slide 28:

20 times THE STOMACH INCREASES UP TO 20 TIMES ITS ORIGINAL SIZE AFTER A PERSON EATS

See You in the Stomach:

See You in the Stomach It has three important jobs: 1. to store the food you've eaten 2 . to break down the food into a liquidy mixture 3. to slowly empty that liquidy mixture into the small intestine

Liver & Pancreas:

Liver & Pancreas

Liver:

Liver

Gall Bladder:

Gall Bladder

Pancreas:

Pancreas

Slide 34:

T he liver is the largest gland of the human body and the second largest organ (the skin is the largest). The liver produces bile, a yellowish-green fluid that helps in the digestion of fats .

Small & Large Intestine:

Small & Large Intestine T he longest part of the digestive tract. It is about 26 to 30 feet (8 to 9 m) long and runs from the stomach to the anus.

The Small Intestine:

The Small Intestine The small intestine (say: in-tes-tin) is a long tube that's about 1½ inches to 2 inches (about 3.5 to 5 centimeters ) around, and it's packed inside you beneath your stomach.

The Small Intestine - Length:

The Small Intestine - Length If you stretched out an adult's small intestine, it would be about 22 feet long (6.7 meters) — that's like 22 notebooks lined up end to end, all in a row!

Slide 38:

The small intestine breaks down the food mixture even more so your body can absorb all the vitamins, minerals, proteins, carbohydrates, and fats. The small intestine takes little help from three friends: pancreas , liver, and gallbladder .

Small Intestine - Wall:

Small Intestine - Wall

The Large Intestine:

The Large Intestine At 3 or 4 inches around (about 7 to 10 centimeters), the large intestine is fatter than the small intestine and it's almost the last stop on the digestive tract. Like the small intestine, it is packed into the body, and would measure 5 feet (about 1.5 meters) long if you spread it out.

The Large Intestine:

The Large Intestine

CAECUM:

CAECUM Initial section of the large intestine

ASCENDING COLON:

ASCENDING COLON The water and mineral salts are absorbed along the length of the large intestine in a process that removes water from the digestive waste.

TRANSVERSE COLON:

TRANSVERSE COLON The undigested remains begin to be Transformed into feces.

DESCENDING COLON:

DESCENDING COLON The feces are solidified and accumulate before being expelled.

RECTUM:

RECTUM The final point of the accumulation of the feces. Its storage capacity is small.

ANUS :

ANUS Opening in the large intestine through which the feces exit