Structures and Functions of the Digestive System: A Comprehensive Overview

Biology
Presented by:

Structures and Functions of the
Digestive System
 Mouth
– Ingests food
– Chemical analysis of
carbohydrates
– Initiates the breakdown of
lipids through lingual lipase
– Food is moved to the pharynx
 Pharynx
– Pushes food from the mouth
to the oesophagus (Kong and
Singh, 2008).

Structures and Functions of the
Digestive System...
Stomach
– Mixes and churns food with
gastric juices to form chime
– Commences chemical
breakdown of proteins
– The food (in the form of
chime) is released to the
duodenum
– Absorbs some fat soluble
substances such as aspirin
(Kong and Singh, 2008).
 Oesophagus
– Found in the throat near the
trachea
– Receives food once
swallowed
– Delivers food to the
stomach through peristalsis
– Lubricates food and
passageways
– Delivers food to the
stomach (Kong and Singh,
2008).