Torsion in Gastropoda 🐌 | Shell in Mollusca 🐚 | Pearl Formation in Mollusca 🦪 | BSc Zoology

Описание: In this video, we have explained three important and high-scoring topics from the Phylum Mollusca in a clear and easy Hinglish format :

🔹 Torsion in Gastropoda
🔹 Shell in Mollusca
🔹 Pearl Formation


The concept of torsion has been explained step by step, including its definition, mechanism, stage of occurrence, advantages, disadvantages, and detorsion. Each technical term such as visceral mass, mantle cavity, chiastoneury, and veliger larva has been explained in simple language for better understanding.


The structure and composition of the molluscan shell have also been discussed, including its three layers — periostracum, prismatic layer, and nacreous layer — along with their functions.


In the pearl formation section, we have covered the complete process, types of pearls (natural and cultured), pearl-producing molluscs, and economic importance.


This video is especially useful for :

BSc Zoology students
CUET PG aspirants
University exam preparation
Competitive exams in Life Sciences


Watch till the end to understand the full concept clearly and revise efficiently.


If you found this video helpful, don’t forget to like, share, and subscribe for more Zoology content.


#Zoology
#Mollusca
#Gastropoda
#Torsion
#ShellInMollusca
#PearlFormation
#BScZoology
#CUETPG
#LifeSciences
#BiologyStudents
#ZoologyLecture
#ExamPreparation