Essay
Digestive System Assignment Unit 11
- Institution
- PEARSON (PEARSON)
ALL content needed for a D grade!
[Show more]
Connected book
Book Title:
Author(s):
- Edition:
- ISBN:
- Edition:
4 reviews
By: ael014 • 3 year ago
good template for this assignment thank you
By: janiceyeb • 3 year ago
By: modzonps3 • 3 year ago
By: nianushiya • 5 year ago
Content preview
Digestive System1a.
Mouth- Digestion begins in the mouth when food is ingested and when the food is
chewed the molar teeth break down the food into smaller pieces, this process is
called mechanical digestion. During this stage saliva from the salivary glands that
contain enzymes are around the mouth and the saliva helps begin to chemically
digest the food. The tongue allows the chewed food to be pushed through the
pharynx (throat) and down the oesophagus.
Oesophagus- The oesophagus (long, thin, and muscular tube) that helps connect the
pharynx to the stomach. The gastrointestinal tract helps food and liquids that have
been swallowed and chewed through the pharynx and into the stomach. The
oesophagus does not digest anything however the walls in the oesophagus help
secrete mucus to allow food to pass easily.
Stomach- The stomach produces enzymes and acids that help digest food. Oxyntic
cells in the gastric pits produce hydrochloric acid, this acid assists on making the ph.
level low and allows many bacteria on the food to be killed/destroyed. The muscles in
the stomach contract continuously, as the stomach churns food, and fats melt and
proteins begin to be digested, at this stage the semi-digested food is called chime.
Following from this the pyloric sphincter muscle (muscular valve) that opens to
release food from the stomach to the small intestine.
Small intestine- The digestion now is taking place in the small intestine, where the
chyme (semi-digested food) enters the duodenum and hormones are transmitted
through the blood and trigger the pancreas to free pancreatic juice and also allowing
the gall bladder to release bile. Bile is made in the liver and stored in the gall bladder,
it contains bile acids which are vital for digestion. Bile has salts that emulsify fats,
increasing their surface area for lipase enzymes to work on, contains hydrogen
carbonate ions that help neutralise the acidic chyme also many waste products are
eliminated from the body to faeces.
Gall bladder- The gallbladder is a small storage organ located close to the liver. It is
small in size; the gallbladder plays a vital role in our digestion of food. The
gallbladder stores bile produced in the liver until it is needed for digesting fatty foods
in the duodenum of the small intestine.
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller SarahM9. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for £5.49. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
62555 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy revision notes and other study material for 14 years now