Salivary glands are accessory digestive organs that produce saliva, which serves to lubricate food and aid in digestion through enzymes. Three salivary glands in the mouth are the parotid, sublingual, and submandibular glands.

Salivary Glands

Organs that are not part of the digestive tract but contribute to its functioning, such as by secreting substances that aid in digestion. Some such organs include:

- Salivary glands
- Liver
- Gallbladder
- Spleen
- Pancreas

University of Notre Dame

Some parts of the digestive system include:

- Mouth/Oral cavity
- Accessory Digestive Organs
- Pharynx
- Esophagus 
- Stomach
- Small Intestine
- Large Intestine
- Rectum 
- Anus

(Photo credits in References)

Anatomy of the Digestive System

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Anatomy of the Digestive System Figure (Figure 24.2). Reprinted from OpenStax Microbiology (p. 981), by N. Parker, M. Shneegurt, A.-h. Thi Tu, B. M. Forester, and P. Lister, 2016, Rice University. Copyright 2016 by Rice University.

Anatomy of the Digestive System Figure

Accessory Digestive Organs

The mouth, or oral cavity, serves as the first step in food processing, with its parts contributing to both mechanical and chemical digestion before passing the food along to the GI tract. Some parts of the digestive system include:

- Tongue
- Teeth
- Lips
- Gums
- Salivary glands

(Photo credits in References)

Oral Cavity

Oral Cavity -> Pharynx -> Esophagus -> Stomach -> Small Intestine (First Part: Duodenum)-> Large Intestine/Colon (Last Part: Rectum-> Anus

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