Saturday, December 26, 2009

Having a healthy diet?

A healthy diet is one that helps maintain or improve health. It involves consuming appropriate amounts of all nutrients, and an adequate amount of water. Nutrients can be obtained from many different foods, so there are a wide variety of diets that may be considered healthy diets.Without a healthy diet, we will have many chronic health risks such as: obesity, heart disease, diabetes, and cancer.

Learning Aims

Hi i am Yong Kai Shiun. This is the first time we had to do a blog for an assignment. From this blog we learnt about the importance of a healthy diet and how are the food digested in our body.i learnt that digestion can be made up of several important steps such as how food passes through our body and how our body turns those food into energy that we use in our daily lives.

Saturday, December 19, 2009

week 2 reflection

i have completed the meal log for four day period it was quite simple,and i learnt that one must first have a healthy diet in order to be healthy.

meal log

Day 1
-breakfast=bread with a cup of milo
-lunch=fried rice with vegetables
-tea=cookies with a cup of coffee
-dinner=prawn noodles

Day 2
-breakfast=milo
-lunch=cabbage,porridge,apple
-tea=coffee,cake
-dinner=mixed rice

Day 3
-breakfast=kaya toast with milk
-lunch=mee siam with fish
-tea=chicken burger
-dinner=bee hoon

Day 4
-breakfast=cereal
-lunch=instant noodles with curry chicken
-tea=banana
-dinner=fruit pizza



week 1 reflection

This is the first week i started creating a blog so i don't know some of the stuff at first it was thanks to advice from friends that i finally manage to create the first post.Now,i think that creating a blog is quite simple and fun.

how does a digestive system break down foods?

Digestion is the breaking down of foods into a form that our body can use. This is the process of food through the digestive system or gastrointestinal tract, and undergoes three processes as a summary of the process of food: absorption, elimination, and digestion.

Even before you take your first bite of food, your stomach is getting ready to digest your food, and will be digesting it for the next couple of hours or days, depending on what you ate. This process of digestion is how your body allows you to absorb the nutrients and energy from the food you eat.

When you first smell a food, or maybe even think about it, your mouth produces saliva, which helps to break down chemicals in the food. When you are done chewing, your tongue pushes the food down the throat into the stomach.The stomach has three jobs which is to store the food that has been eaten, break down the food into a liquid, and to slowly empty the liquid into the small intestine. To keep the stomach from digesting itself, it is lined with a thin membrane called mucousa, and that secretes a protective, slimy covering of mucus. The muscles of the stomach mix all the food together with gastric juices, which help to kill any bacteria that might have been in the food. This thick liquid is called chyme.

The small intestine, which is actually the most important step of digestion (not the stomach!), is about one to two inches around, and is right below the stomach. If you stretched out an adult's intestine, it would be over twenty-two feet long. The small intestine serves to break down food even further, so that your body can absorb all the proteins, carbs, fats, etc. that it needs. The pancreas, gallbladder, and liver also help in this. The pancreas produces juices that help to digest fats and proteins. Bile from the liver absorbs fats into the bloodstream, and the gallbladder stores the bile, until it is needed by the liver.

All the nutrients then travel to the liver, while everything else that has not been digested goes to the large intestine.

Next is the large intestine, where all the food that cannot be digested goes. Since it cannot be digested, it must leave the body; but before it goes, it passes through a part of the large intestine called the colon, which is where the body gets its last chance to absorb some of the nutrients from it that are left. Once it is done, it becomes a solid, and exits the body.

what is a digestive system?



The digestive system is a series of hollow organs joined in a long, twisting tube from the mouth to the anus. Inside this tube is a lining called the mucosa. In the mouth, stomach, and small intestine, the mucosa contains tiny glands that produce juices to help digest food. There are also two solid digestive organs, the liver and the pancreas, which produce juices that reach the intestine through small tubes. In addition, parts of other organ systems also plays a major role in the digestive system.