WHAT IS THE DIGESTIVE SYSTEM USED FOR?
It breaks down nutrients in to small parts enough for my body to absorb it and use it for energy, growth, cell repair.
THE MAIN PARTS OF THE DIGESTIVE SYSTEM.
- Oesophagus
- Stomach
- Small intestine
- The liver
- The large intestine
O E S O P H A G U S
The function:
It acts as a highway for the food and liquids to reach the stomach after being swallowed
Where do you find it:
It is in you
The structure if the oesophagus:
There is layer of circular muscle on top of the layer of longitudinal muscle which is about an inch wider than the circular muscle
The process of peristalsis:
- The circular muscles contract behind the bolus (Latin for "ball") of food pushing it downwards
- longitudinal muscle contract widening the diameter and shortening the length of the tube
- The motion continues until it reaches the stomach
S T O M A C H
What does it look like:
The stomach is about 30.5 cm long and 15.2 cm wide and it holds up too 2-4 litres - meaning the meal can be ingested rapidly while digesting over time. The inside of the stomachis lined with holes called gastric pits so that food can get in. There are 3 types of gastric fluid
- Temporary storage for food, which passes through the oesophagus to the stomach where it is held for two hours or longer
- Mixing and breakdown of food
- Digestion of food
S M A L L I N T E S T I N E
Where is it?
It sits between the stomach and the large intestine
What does it look like:
The lining of the small intestine is covered by small finger-like ridges called villi
Main function of the small intestine:
The villi helps the nutrients in food to absorb in to the blood
The ph of the liver is usually between 7 and 9 meaning neutral or slightly alkaline
L I V E R
Where is it?
It is a large organ that sits on the right side of the stomach.
What does it look like?
The reddish-brown organ weighs about 3 pounds. It has two large sections called; the left lobe and the right lobe. The gallbladder sits right under the liver, along with the pancreas and intestines, they all work together to digest and absorb food.
The function.
The main functions of the liver is to filter the blood from the digestive tract before passing it to the next organ, detoxifies and metabolizes drugs and it is also able to make proteins important for blood clotting.
The liver maintains the ph level of 7 meaning neutral, which is easiest for the enzymes to work in
L A R G E I N T E S T I N E
Where is it?
It is located either just or below the waist.
What does it look like?
The large intestine is about 5 feet long
The funtion.
To absorb water and salts from the material that has not been digested as food it also get rid of any waste products left. The large intestine is put into the following parts:
What does it look like:
The stomach is about 30.5 cm long and 15.2 cm wide and it holds up too 2-4 litres - meaning the meal can be ingested rapidly while digesting over time. The inside of the stomachis lined with holes called gastric pits so that food can get in. There are 3 types of gastric fluid
- Hydrochloric (HC)
- Pepsin
- Mucus
- Temporary storage for food, which passes through the oesophagus to the stomach where it is held for two hours or longer
- Mixing and breakdown of food
- Digestion of food
S M A L L I N T E S T I N E
Where is it?
It sits between the stomach and the large intestine
The lining of the small intestine is covered by small finger-like ridges called villi
Main function of the small intestine:
The villi helps the nutrients in food to absorb in to the blood
The ph of the liver is usually between 7 and 9 meaning neutral or slightly alkaline
L I V E R
Where is it?
It is a large organ that sits on the right side of the stomach.
What does it look like?
The reddish-brown organ weighs about 3 pounds. It has two large sections called; the left lobe and the right lobe. The gallbladder sits right under the liver, along with the pancreas and intestines, they all work together to digest and absorb food.
The function.
The main functions of the liver is to filter the blood from the digestive tract before passing it to the next organ, detoxifies and metabolizes drugs and it is also able to make proteins important for blood clotting.
The liver maintains the ph level of 7 meaning neutral, which is easiest for the enzymes to work in
L A R G E I N T E S T I N E
Where is it?
It is located either just or below the waist.
What does it look like?
The large intestine is about 5 feet long
The funtion.
To absorb water and salts from the material that has not been digested as food it also get rid of any waste products left. The large intestine is put into the following parts:
- Cecum: This is the first section of the large intestine it looks a bit like a 2 inchs long pouch
- Colon: The colon is the major section. The main place for water re-absorption the colon is in 4 parts
- Ascending colon: pushes undigested debris from the cecum to a location just under the bottom right end of the liver.
- Transverse colon: the food moves through the transverse colon across the front abdominal wall.
- Descending colon: pushes the contents from the spleen to the bottom left side of the abdomen
- Sigmoid colon: The "S" shaped length of the colon, curves inwards, then empties it into the rectum
- the last section of the digestive tract, the length about 2.5 - 4 cm left over wasted is collected here.
No comments:
Post a Comment
Note: Only a member of this blog may post a comment.