Stage+3+Absorbing

=Unit 1 Cells and Systems=

Chapter 2 Human body systems work independently and together
2.2 The Digestive and Excretory Systems


 * Stage 3: Absorbing** page 74-75

During the 3rd stage of digestion, nutrients go through the process of absorption. Inside the 5 meter-long small intestine, food passes through by peristalsis,and the folds in the intestine called villi, will absorb the nutrients. This process will take around 5-6 hours long. Later on, the remaining of the nutrients will enter the large intestine, where undigested material will be reabsorbed and become rid of 90% of its water and some minerals. This process takes up to 12-24 hours long. Inside the 5cm wide, and 1.5m long large intestine, bacteria also plays a role as helper for digestion, which is why babies receive a shot of Vitamin K to help them until they have enough bacteria inside their digestive system.


 * **Questions** || **Answers** ||
 * What is the process called when the nutrients are ready to be absorbed by the existing 5 m of the small intestine? || This process in the small intestine is called absorption. ||
 * What do villi do? || Villi has the function of absorbing nutrients from the chyme flow. ||
 * What are villi? || Villi are structures that look like folds in the wall of the small intestine. ||
 * How many hours does food take to pass through the small intestine by peristalsis? || Food usually takes 6 hours to pass through the small intestine by peristalsis. ||
 * How wide and long is your large intestine? || The large intestine is 5cm wide, and 1.5m long. ||
 * What does your large intestine do? || The main function of the large intestine is to take in undigested material from the small intestine and reabsorb the water and some minerals. ||
 * What happens when the undigested materials leaves the large intestine? || When the undigested food leaves the large intestine, 90% of its water that has entered the small intestine has been reabsorbed. ||
 * How long does this process take? || This process of re-absorption takes up to 12-24 hours. ||
 * What do beneficial bacteria do? || Beneficial bacteria in the digestive system assist in the breakdown and absorption of food. ||
 * Many different types of what live in your digestion system? || Many types of bacteria live in our digestive system. ||
 * How does vitamin K help with? || Vitamin K made by the large intestine from undigested material helps blood to clot (form lumps). ||
 * Why do doctors give babies a shot of vitamin K at birth? || Shots of Vitamin K are given to babies so that bacteria can start to multiply until it is able to reproduce in the digestive system. ||
 * What happens when the undigested materials leaves the large intestine? || When the undigested food leaves the large intestine, 90% of its water that has entered the small intestine has been reabsorbed. ||
 * How long does this process take? || This process of re-absorption takes up to 12-24 hours. ||
 * What do beneficial bacteria do? || Beneficial bacteria in the digestive system assist in the breakdown and absorption of food. ||
 * Many different types of what live in your digestion system? || Many types of bacteria live in our digestive system. ||
 * How does vitamin K help with? || Vitamin K made by the large intestine from undigested material helps blood to clot (form lumps). ||
 * Why do doctors give babies a shot of vitamin K at birth? || Shots of Vitamin K are given to babies so that bacteria can start to multiply until it is able to reproduce in the digestive system. ||
 * Many different types of what live in your digestion system? || Many types of bacteria live in our digestive system. ||
 * How does vitamin K help with? || Vitamin K made by the large intestine from undigested material helps blood to clot (form lumps). ||
 * Why do doctors give babies a shot of vitamin K at birth? || Shots of Vitamin K are given to babies so that bacteria can start to multiply until it is able to reproduce in the digestive system. ||
 * Why do doctors give babies a shot of vitamin K at birth? || Shots of Vitamin K are given to babies so that bacteria can start to multiply until it is able to reproduce in the digestive system. ||
 * Why do doctors give babies a shot of vitamin K at birth? || Shots of Vitamin K are given to babies so that bacteria can start to multiply until it is able to reproduce in the digestive system. ||