https://padlet.com/paulabadiola/bf995henm2ih2659 By: Paula, Mireia and Myriam en-us 2023-03-02 13:42:02 UTC 2023-03-09 20:07:22 UTC hello@padlet.com https://padlet.net/icons/png/1f349.png mireiabarnes https://padlet.com/paulabadiola/bf995henm2ih2659/wish/2501132641 The passage of molecules from digested food through the wall of the instentine and into the blood or lymph is known as absorption.]]> 2023-03-02 13:54:10 UTC https://padlet.com/paulabadiola/bf995henm2ih2659/wish/2501132641 mireiabarnes https://padlet.com/paulabadiola/bf995henm2ih2659/wish/2501133715 Digestion is completed in the small intestine more specifically in the ileum (the last section of the small intestine). By now, most carbohydrates have been broken down to simple sugar, proteins to amino acids, and fats to fatty acids and glycerol. These molecules are small enough to pass through the wall of the small intestine and into the blood. ]]> 2023-03-02 13:54:53 UTC https://padlet.com/paulabadiola/bf995henm2ih2659/wish/2501133715 myriammora3 https://padlet.com/paulabadiola/bf995henm2ih2659/wish/2501135330 During digestion, food is broken down and processed into nutrients used for the body to properly function and to be healthy. However, food doesn't get processed easily, as it has to follow certain steps to be digested. ]]> 2023-03-02 13:55:52 UTC https://padlet.com/paulabadiola/bf995henm2ih2659/wish/2501135330 mireiabarnes https://padlet.com/paulabadiola/bf995henm2ih2659/wish/2502370703 The plasma membrane of the cells of the villi is folded into the microvilli. Nutrients are absorbed though the epithelium that covers the intestinal villi. It is a single layer of cells connected to a large network of blood capillaries. Nutrients pass through the epithalic cells to the blood or lymphatic vessels, to be distributed throughout the body.]]> 2023-03-03 09:07:29 UTC https://padlet.com/paulabadiola/bf995henm2ih2659/wish/2502370703 myriammora3 https://padlet.com/paulabadiola/bf995henm2ih2659/wish/2502377000 Food is firstly chowed down using the jaw/mouth, which is considered as mechanical process, meaning that the food is broken down into smaller parts using the teeth and tongue and is mixed with saliva.]]> 2023-03-03 09:14:05 UTC https://padlet.com/paulabadiola/bf995henm2ih2659/wish/2502377000 mireiabarnes https://padlet.com/paulabadiola/bf995henm2ih2659/wish/2502378088 https://www.savemyexams.co.uk/dp/biology_sl/ib/16/revision-notes/6-human-physiology/6-1-digestion--absorption/6-1-2-villi--absorption/

https://biology-igcse.weebly.com/absorption-ndash-function-of-the-small-intestine-and-significance-of-villi.html ]]> 2023-03-03 09:15:15 UTC https://padlet.com/paulabadiola/bf995henm2ih2659/wish/2502378088 myriammora3 https://padlet.com/paulabadiola/bf995henm2ih2659/wish/2502381135 Saliva contains a special enzyme, named amylase. It helps to break down long chains of starch into smaller pieces. Saliva helps to start the chemical process of carbs. After the food is crushed down, the mouth forms a food bolus, or food ball, which is ready to be swallowed.]]> 2023-03-03 09:18:40 UTC https://padlet.com/paulabadiola/bf995henm2ih2659/wish/2502381135 paulabadiola https://padlet.com/paulabadiola/bf995henm2ih2659/wish/2502384136 The food in the stomach mixes with gastric juices which contains hydrochloric acid and the enzyme, breaking it into much smaller digestible pieces ( chyme ) which leaves the stomach through the pylorus.]]> 2023-03-03 09:22:03 UTC https://padlet.com/paulabadiola/bf995henm2ih2659/wish/2502384136 paulabadiola https://padlet.com/paulabadiola/bf995henm2ih2659/wish/2502386189 The walls of the stomach are covered with mucous to protect the stomach lining from the gastric juices. ]]> 2023-03-03 09:23:54 UTC https://padlet.com/paulabadiola/bf995henm2ih2659/wish/2502386189 paulabadiola https://padlet.com/paulabadiola/bf995henm2ih2659/wish/2502390954 https://kidshealth.org/en/teens/digestive-system.html ]]> 2023-03-03 09:28:52 UTC https://padlet.com/paulabadiola/bf995henm2ih2659/wish/2502390954 myriammora3 https://padlet.com/paulabadiola/bf995henm2ih2659/wish/2502403822 Once the food bolus is ready to be swallowed, it is pushed down into the pharynx by the tongue. There is a special flap that covers the trachea so that it doesn't enter your lungs, and it is called epiglottis. This flap folds and closes whilst swallowing. The food then passes into the oesophagus, which has various involuntary muscles that push the food down inti the stomach, such as smooth muscles. These involuntary muslce movements are called peristalsis. The food is then passed to the stomach.]]> 2023-03-03 09:42:40 UTC https://padlet.com/paulabadiola/bf995henm2ih2659/wish/2502403822 paulabadiola https://padlet.com/paulabadiola/bf995henm2ih2659/wish/2502406193 This process is chemical, the digestive juices transforms the chewed food into into simple chemicals]]> 2023-03-03 09:44:47 UTC https://padlet.com/paulabadiola/bf995henm2ih2659/wish/2502406193 mireiabarnes https://padlet.com/paulabadiola/bf995henm2ih2659/wish/2502406376 This process is chemical . In the small intestine, chyme mixes with bile, pancreatic juices and intestinal juices. Digestion of fats begin and carbohydrates and protein digestion is complete. Chyme is turned into a milky liquid called chyle.]]> 2023-03-03 09:44:57 UTC https://padlet.com/paulabadiola/bf995henm2ih2659/wish/2502406376 myriammora3 https://padlet.com/paulabadiola/bf995henm2ih2659/wish/2502407115 https://www.ncbi.nlm.nih.gov/books/NBK544242/
https://www.cancer.gov/publications/dictionaries/cancer-terms/def/epiglottis
https://www.altonmemorialhospital.org/Health-Library/View-Content?contentTypeId=134&contentId=193]]> 2023-03-03 09:45:37 UTC https://padlet.com/paulabadiola/bf995henm2ih2659/wish/2502407115 mireiabarnes https://padlet.com/paulabadiola/bf995henm2ih2659/wish/2502414123 The small intestine has 3 features:

- Muscular folds: the inner part of the intestine is circular folds, not only this increase surface area but also controls how quickly food is metabolized and passed through your intestines. 
-Villi :The inner surface is folded and they are like finger-like projections and there are covered with cells that help absorb nutrients from the food that passes through.
-Microvilli: The cells of each villus is covered, they are like tiny hair structure and increase the surface of each individual cell, meaning that each cell can absorb more nutrients. ]]> 2023-03-03 09:52:12 UTC https://padlet.com/paulabadiola/bf995henm2ih2659/wish/2502414123 paulabadiola https://padlet.com/paulabadiola/bf995henm2ih2659/wish/2502414444 The undigested food reaches the large intestine, water is remained and the remaining becomes more solid, forming faeces. The large intestine is colonised by symbiotic bacteria, which makes up the intestinal flora, this bacteria produces vitamins K and B and absorbs them into the blood. 
The remaining undigested waste is expelled through the anus by defecation.]]> 2023-03-03 09:52:26 UTC https://padlet.com/paulabadiola/bf995henm2ih2659/wish/2502414444 paulabadiola https://padlet.com/paulabadiola/bf995henm2ih2659/wish/2504912801 2023-03-06 10:16:26 UTC https://padlet.com/paulabadiola/bf995henm2ih2659/wish/2504912801 paulabadiola https://padlet.com/paulabadiola/bf995henm2ih2659/wish/2504915548 Although the large intestine's glands secrete mucus, they do not secrete digestive enzymes. Therefore, chemical digestion in the large intestine is entirely caused by bacteria in the lumen of the colon.]]> 2023-03-06 10:18:48 UTC https://padlet.com/paulabadiola/bf995henm2ih2659/wish/2504915548 mireiabarnes https://padlet.com/paulabadiola/bf995henm2ih2659/wish/2504993026 The small intestine is about 7-8 meters long. There are 10-40 villi per square millimiter. There are approximately 200 million microvilli per square millimetre of the intestine. Surface area of the intestine is increased to 200 square metres.]]> 2023-03-06 11:23:50 UTC https://padlet.com/paulabadiola/bf995henm2ih2659/wish/2504993026 mireiabarnes https://padlet.com/paulabadiola/bf995henm2ih2659/wish/2505006384 - https://www.chp.edu/our-services/transplant/intestine/education/about-small-large-intestines ]]> 2023-03-06 11:35:00 UTC https://padlet.com/paulabadiola/bf995henm2ih2659/wish/2505006384