Curated OER
Kids Health: Digestive System
The parts of the digestive system and how they function are explained. An interactive diagram shows the location of each part of the system, and summarizes what each does. Disorders of the digestive system are also described.
Colorado State University
Colorado State University: Basic Functional Anatomy of the Digestive System
This site has a concise description of the digestive system with a nice diagram. The site also provides basic definitions of key parts.
University of Guelph
Department of Animal and Poultry Science: Digestive System
The main focus here is on the comparative anatomy of animals raised for meat. Beware of the photographs, as they are dissection photos.
Colorado State University
Colorado State University: Absorption of Monosaccharides
Page focuses on the processes involved in the generation of monosaccharides and their absorption into the digestive tract. Image shows the transport of glucose across the intestinal epithelium.
OpenStax
Open Stax: Exercise, Nutrition, Hormones, and Bone Tissue
All of the organ systems of your body are interdependent, and the skeletal system is no exception. The food you take in via your digestive system and the hormones secreted by your endocrine system affect your bones. Even using your...
Better Lesson
Better Lesson: Mitochondria "The Powerhouse of the Cell"
In this lesson and lab activity, learners learn about digestion and fermentation, and watch a demonstration of cellular respiration in yeast. Includes numerous real-world connections, e.g., how fermentation is used by humans.
Regents of the University of Michigan
Animal Diversity Web: Introduction to Teeth
The Animal Diversity Web offers a very good description of teeth in the digestive process of mammals. Covers the variety of teeth and links to discussions on a variety of teeth issues.
Vision Learning
Visionlearning: Energy in Living Systems: Energy Metabolism I
Detailed explanation of how food is broken down and metabolized in our bodies to be used for energy.
Other
Ornithology: Metabolism and Thermoregulation
A good site that discusses the rate at which a bird's metabolism functions and its effect on the body temperature of the animal.
BiologyWise
Biology Wise: Starfish Anatomy
Describes anatomical features of a starfish, including external anatomy, digestive system, and nervous system.
BiologyWise
Biology Wise: Earthworm Biology: Science of the Natural Decomposers
The anatomy of an earthworm is described and how it reproduces.
MadSci Network
Why Is Our Intestine So Long?
A concise description of the functions of the large and small intestine along with information on the length of each.
Other
Nutri Notes: Physiology of the Large Intestine
A description of how food is absorbed and excreted in the large intestine.
Other
Aqua Scope: The Common Whelks Appearance
This site from AquaScope talks about how big a whelk can get, the color, how they move, where the digestive and nervous systems are found.