Thursday, August 30, 2007

The Digestive System

I am a fruit. I am eaten by a good boy to give him energy. For that I have to enter his body especially into his digestive system process. Ups….before he eats me I saw his saliva comes out from his mouth.

The Digestive Process

1. The mouth

Because the digestive process begins in the mouth, I have to enter his mouth. He bites me so that I can enter his mouth. I am partly broken down by the process of chewing and by the chemical action of salivary enzymes.

On the way to the stomach, the parts of me have to go to the esophagus. After being chewed and swallowed, I enter the esophagus. The oesophagus is a long tube that runs from the mouth to the stomach. It uses rhythmic, wave-like muscle movements (called peristalsis) to force food from the throat into the stomach. This muscle movement gives human the ability to eat or drink even when they're upside-down.

2. In the stomach - The stomach is a large, sack-like organ that shakes the food and bathes it in a very strong acid (gastric acid). Food in the stomach that is partly digested and mixed with stomach acids is called chyme.

3. In the small intestine - After being in the stomach, the parts of me enter the ileum (the final part of the small intestine). In the small intestine, bile (produced in the liver and stored in the gall bladder), pancreatic duodenum, the first part of the small intestine. It then enters the jejunum and enzymes, and other digestive enzymes produced by the inner wall of the small intestine help in the breakdown of food.

4. In the large intestine - After passing through the small intestine, I pass into the large intestine. In the large intestine, some of the water and electrolytes (chemicals like sodium) are removed from the food. Many microbes (bacteria like Bacteroides) in the large intestine help in the digestion process. The first part of the large intestine is called the cecum (the appendix is connected to the cecum). Food then travels upward in the ascending colon. The food travels across the abdomen in the transverse colon, goes back down the other side of the body in the descending colon, and then through the sigmoid colon.

5. The end of the process - Solid waste is then stored in the rectum until it is excreted via the anus.

The main path of our digestive system:

  • Mouth
  • esophagus
  • stomach
  • small intestine
  • large intestine
  • anus

The Facts:

1. Acids and enzymes eat away at the surface of food to break it down.
2. The small intestine is where food is broken down into molecules tiny enough for the body cells to use.
3. In the villi are tiny tubes that carry blood called VESSELS. Food molecules are taken into these blood vessels. Once the food is in the blood, it can travel all over the body.
4. Chewing food takes from 5-30 seconds.
5. Swallowing takes about 10 seconds.
6. Food sloshing in the stomach can be last 3-4 hours.
7. It takes 3 hours for food to move through the intestine.
8. Food drying up and hanging out in the large intestine can last 18 hours 2 days!
9. Rectum is the lower part of the large intestine, where feces are stored before they are excreted. 10. What causes our stomach to growl? Stomach growling occurs when the stomach receives signals from your brain to begin digestion but the stomach is empty.


Tuesday, August 21, 2007

My Holiday

On my holiday, I only stayed at home because my parents didn't have a plan to go holiday. They had a busy time to work. They didn't have a permission not to go to work at that time.

But it was OK, I had a very good day also. Suddenly, my dad asked us if we wanted to go to Lembang. Wow, it was surprised, finally we had time to go out.

When we were in Lembang, we went to a museum. It was a big museum. I got a lot of information about train. We had some delicious food. We spent four days in Lembang.

Then we had to go home to Sentul and continued my holiday at home. That's my holiday.