About Lesson
MOUTH PARTS
- The mouthparts are the organs concerned for the ingestion of different nature of food.
- The mouth parts comprises of the following:
a) the unpaired upper lip or labrum in front,
b) the lower or ventral surface of which forms the epipharynx,
c) a tongue like hypopharynx behind the mouth,
d) a pair of jaws or mandibles,
e) the paired maxillae and a labium forming a lower lip.
- In insects, the mouthparts do not lie in a cavity of the head and the condition is called ectognathous. Eg: The mouth parts of Collembola, Diplura and Protura.