{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

chp 25 - Chapter 25 Digestive System Functions of the...

Info icon This preview shows pages 1–7. Sign up to view the full content.

View Full Document Right Arrow Icon
Chapter 25 Digestive System
Image of page 1

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Functions of the Digestive System Ingestion – intake of food into body Secretion – addition of chemicals to food Motility – movement of food through GI tract Digestion – mechanical & chemical breakdown of complex molecules to simple ones Absorption – movement of simple molecules from GI tract to blood Excretion – expulsion of unusable material (defecation)
Image of page 2
Stuff Final exam – Wednesday, Dec. 8 1:30 – 4:00 - here 180 pts. ~ ½ new material ~ ½ comprehensive Similar format
Image of page 3

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Major divisions Gastrointestinal (GI) tract Single continuous tube – passage of food esophagus stomach sm. intestine colon rectum Accessory structures/organs : aid in functions of dig. system tongue/teeth/salivary glands/pharynx liver/pancreas
Image of page 4
Layers of the GI Tract o Mucosal layer o mucus memb. w/ 3 layers o 1 - epithelial cells & secretory cells (e.g. goblet) o 2 - areolar c.t. (lamina propria) o 3 - thin layer of smooth muscle - causes ridges (rugae, plicae circulares) o Protection, lubrication/ absorption/ secretion Fig. 25.2
Image of page 5

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Layers of the GI Tract Fig. 25.2 o Submucosal layer o thick layer of areolar c.t.
Image of page 6
Image of page 7
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern