Class notes
Digestion and Absorption
- Course
- Nurs220 (NURS220)
- Institution
- University Of South Carolina
Lecture notes and vocabulary from chapter 1. Relating to digestion and absorption of nutrients from carbs, fats, and proteins.
[Show more]
Connected book
Book Title:
Author(s):
- Edition:
- ISBN:
- Edition:
Seller
Follow
Content preview
Anatomy of the Digestive TractGastrointestinal tract: flexible, muscular tubing for the mouth to the anus
● Include sphincters, not just organs
Upper esophageal sphincter (UES): upper end of the esophagus
Lower esophageal sphincter (LES): lower end of the esophagus
AKA cardiac sphincter
Pyloric sphincter: separates stomach to the small intestine and regulates flow of partially
digested food
Bolus: the portion of food swallowed at one time
Passage of Food:
● Teeth
● Tongue
● Pharynx
● Epiglottis
● Esophagus
when we swallow, the upper esophageal sphincter opens
● Bolus slides down esophagus through the diaphragm into the stomach, where the lower
esophageal sphincter closes behind it to prevent backflow
● The stomach adds gastric juices that grinds the bolus into semi-liquid mass called
CHYME.
Small Intestine
Chyme then passes through the pyloric sphincter into the small intestine
Chyme passes the opening to the common bile duct, where fluids enter from the gallbladder and
the pancreas
Chyme then passes through the duodenum, jejunum and ileum.
● Digestion is completed here in the small intestine
Large Intestine (Colon)
Chyme passes through ileocecal valve into the colon
The colon withdraws, water, and electrolytes from the chyme
Waste travels to the rectum
Mechanical Digestion
1. Chewing: teeth and tongue
2. Gastric-intestinal motility
a. Peristalsis: begins in esophagus, where propelling and pushing begins
b. Segmentation: mixes and squeezes, forcing contents back a few inches to mix
with digestive juices
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 or Stuvia-credit 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 marissag1. 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)
72042 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now