Date set: 3.10.14
Date Due in: 9.10.14
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Reading every day. Please
write in your reading diary when you have read.
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Maths (20mins):
Our topic this week is division.
Maths homework will be posted on the mathletics website. Please ask your
teacher for a paper copy if you need one or if you have trouble logging on.
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Literacy (20mins):
Over the next few weeks we will
be writing non-chronological reports about the digestive system which is our
science topic. For your homework please research the organs of the digestive
system and the journey food takes through our bodies.
During your research take notes
and then turn these into sentences in your own words.
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Spellings (20mins) should
be practised for a short time each day, using the words given in sentences.
No! Please let me be whole! Don’t bite me! I’ll do anything, anything at all! Stop! Ah!!! Gulp. What happened over there? Complete nightmare. Oh well, at least that was a dream otherwise Ah! It isn’t a dream! I’m trapped for 4 – 12 hours inside an unknown figure! Well at least I’m whole.
ReplyDeleteOw!! Uncomfortable feeling, this ripple movement of the so called Oesophagus or Food pipe which is 25 cms long in an easier phrase. Papa Grape told me how uncomfortable life (six seconds but I’d say life) in the food pipe would be.
I know that this is the stomach, which helps to digest me with some digestive juices. In my point of view Uggh! Completely Gross. If you see, if I was chewed by those horrible teeth, stroke of luck I didn’t, the chewed food will go down the uncomfortable Oesophagus into the stomach where I will be digested by the gastric juices produced by the stomach wall. The Gastric juices also help kill the bacteria in the eaten food. Now, just like that, I would love it if I could go to the next part of this weird but wonderful human body.
3 hours later… tick, tock…
Finally, Duodenum here I come! For your information, Papa Grape also told me about how this part of the digestive system works so here it goes. The Duodenum is the first part of the big small intestine later on. Here the fatty foods are digested by bile juice stored and released by the gall bladder, originally produced by our Liver friend. So bye Duodenum! Now it would be great if I entered the… Whoosh!
Sorry I hadn’t finished my sentence there! … Small Intestine. Anyway here I am, the small intestine. Did you know that if; you straightened up this organ, it would be taller than 3, 12 year olds! Now lots more nutrients are absorbed by tiny bumps called villi in this organ. Move, quickly to the Large intestine as I’ve got a few more things to discover.
5 hours later…
Uggh! Finally! I’ve (the leftover food which body cannot use) reached the so called large intestine which is fattier than small intestine, here there is a last chance to absorb water and push the nutrients to blood, from colon the poop leads to the rectum and it is sitting here until we are ready to go to bathroom, finally the poop comes out through anus when we are ready, where I’ll come out as poo, into the sewers. I don’t want to talk about it so goodbye!
Plop!
Flush!
The Digestive System
ReplyDeleteBy Prisha
Introduction: The digestive system is an extremely important part of your body. Without it, your body wouldn’t get all the nutrients it needs to grow - it would all end up in the waste – whole! This means that the food does not get absorbed and there is no point of eating.
Even before you eat your meals, think of it, smell it or see it, digestion begins. Saliva (or spit) forms in your mouth. When you chew your food, the saliva breaks down the chemicals in the food, making it soft and easier to swallow. The tongue helps out too, rolling the food into a little ball as the teeth chew. When you’re ready to swallow, the tongue pushes a bit of chewed food (called bolus) towards the back of your throat and into the opening of your oesophagus, the second part of the digestive system.
2. The oesophagus is like a stretchy pipe; it’s about 10 inches (25 cm) long. It moves food from the back of the throat to your stomach. But also at the back of your throat is your windpipe, which allows oxygen/CO2 to come in and out of your body. When you swallow food or liquids, a special flap called the epiglottis flops down over the opening of the windpipe, ensuring that the food gets through your oesophagus and not the windpipe, which would make you choke.
If you’ve ever drunk something too fast, started to cough, and heard people say that your drink ‘went down the wrong way’, the person meant that your drink went down the windpipe instead of the oesophagus. This happens when you drink something so fast that the epiglottis doesn’t have time to flop down over the windpipe, and you cough involuntarily.
Once food enters the oesophagus, it doesn’t just drop straight down like we do on slides. Instead, muscles on either side of the oesophagus slowly squeeze the food through the oesophagus; this takes about 2 or 3 seconds.
3. Your stomach, which is attached to the end of your oesophagus, is like a stretchy sack that is in the form of the letter J. It has three important jobs:
1. to store food
2. to break down the food into a liquid-y mixture
3. to empty that mixture into the small intestine.
The stomach is like a mixer, mashing together all the small balls of food into smaller and smaller pieces with help from the strong walls in the stomach and gastric juices. In addition to breaking down food, gastric juices also kill any germs/bacteria that might be in the eaten food.
....to be continued
....continued
ReplyDelete4. The small intestine is a long tube that’s about 11/2 inches to 2 inches and it’s packed inside you, just beneath your stomach. If you stretched out an adult’s small intestine, it would be about 22 feet long – that’s like 22 notebooks lined up, end to end, all in a row!
The small intestine breaks down the food even more so that your body can absorb all the vitamins, minerals, proteins, carbohydrates and fats. It can extract them with the help of three friends: the pancreas, the liver, and the gall-bladder.
These organs send different juices to the first part of the small intestine (also known as the duodenum). The juices help to digest the food and they also allow the body to absorb nutrients. The pancreas makes juices that help digest fats and proteins; a juice called bile produced by the liver absorbs fats into the bloodstream, while the gall-bladder serves as a warehouse for bile. The food (it’s not much now!) can spend as long as 4 hours in the small intestine and it will become a very thin, watery mixture.
5. The nutrient-rich blood comes directly to the liver for processing. It filters out harmful substances or wastes, turning some of them into more bile. Your liver can even figure out how many nutrients will go to the rest of your body and how many will stay behind in storage! The liver stores certain vitamins and a type of sugar that your body uses for energy.
6. The large intestine – which is about 7 to 10 cm long (3 to 4 inches) - is fatter than the small intestine and it’s nearly the last stop on the digestive system. Like the small intestine, it is packed inside you beneath your stomach, and would measure about 5 feet (1.5 m) long if you spread it out.
It has a tiny tube with a closed end coming off it – it’s called the appendix. Although it’s part of the digestive tract, it doesn’t really seem to do anything, though it could cause serious problems if it gets infected and will need to be removed.
Like we said earlier, when nutrients are removed from the food mixture, there is waste left over – things that your body doesn’t need and can’t use. These need to be removed too (right out of your body this time!); it comes out from the other end of your body...
Before it goes, it must pass through the large intestine, which is where the body get its final chance to absorb all the water it can – and some minerals – into the blood. The water leaves the waste, which means it becomes harder and harder until it’s completely solid...yep, it’s poo!
The large intestine pushes the poo into the rectum, the very last stop on the digestive tract. The poo stays here until you are ready to get rid of it. When you go to the bathroom, you get rid of this solid waste by pushing it through the anus. Yes, disgusting, I know, but you need to learn it!
Digestion and other body functions create waste that must be removed from your body or it will build up and poison you. This waste is called faeces witch is produced by the process of digestion. Urine is also produced by our kidneys and contains waste water and waste formed by our body cells. There are other poisonous substances which our liver makes safe for our body. Digestion starts in your mouth when you chew food and saliva helps to dissolve it. Your tongue moulds the food into a soft ball and pushes it down your oesophagus into your stomach. The stomach churns up the food and after about 3 hours it moves into the duodenum. It then moves into the jejunum and ileum then into the large intestine and then the gall bladder.
ReplyDeleteDigestive System
ReplyDeleteThe food goes into the mouth and gets chopped and ground by the teeth. The enzyme in your saliva helps break down the food which then goes to the oesophagus. The oesophagus pushes the food down towards the stomach. In the stomach the food gets squished and squashed & there are acids that disintegrate the food. The food then passes to the small intestine which breaks it down even more so it can absorb nutrients. The small intestine is helped by bile created in the pancreas. The large intestine doesn’t do much, it gets one last bit of the nutrients out of the food and then it goes in to the toilet.