Dictionary > Stomodeum

Stomodeum

stomodeum
1. A midline ectodermal depression ventral to the embryonic brain and surrounded by the mandibular arch; when the buccopharyngeal membrane disappears it becomes continuous with the foregut and forms the mouth.
Synonym: stomatodeum.
2. The anterior portion of the insect alimentary canal, consisting of mouth, buccal cavity, pharynx, oesophagus, crop (frequently a diverticulum), and the proventriculus.
Origin: Mod. L. Fr. G. Stoma, mouth, – hodaios, on the way, fr. Hodos, a way


You will also like...

temperature - abiotic factor
Abiotic and Biotic Factors

This tutorial deals with the abiotic factors of the freshwater environment that determine what sort of life would be sui..

Energy pyramid
Freshwater Community Energy Relationships – Producers & Consumers

This tutorial looks at the relationship between organisms. It also explores how energy is passed on in the food chain an..

Buttress roots
Roots

This study guide tackles plant roots in greater detail. It delves into the development of plant roots, the root structur..

Still freshwater and plants
Still Freshwater & Plants

Plants in lentic habitats have features not found in terrestrial plants. They acquired these features as they adapt to t..

dinosaurs
The Dinosaurs

Dinosaurs represented a major turn in the evolutionary development of organisms on Earth. The first dinosaurs were presu..

Genetic Mutations
Chromosome Mutations – II

This tutorial is a continuation of the first lesson on chromosomal mutation. Here, find out the chromosomal aberrations ..