Gemmule: Introduction, Parts, Structure, Chracterstics

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Ganongs Potometer

Introduction

Fungus Life Cycle

Gastric Symptoms

Parts of Gemmule

• Inner layer: The internal buds of gemmules can endure freezing, dehydration, and even a lack of oxygen.
• Spicule: Sclera oblasts release amphidisc spicules in the space between the internal and external membranes. A fully developed gemmule has a normal size, hardball-like structure, a mound of food packed with reproductive cells, and an envelope that is thick and double membrane laminated with amphidisc spicules in the middle.
• Micropyle: The micropyle is the exterior coat of a cell with a minute aperture. The peripheral layer comprises a thick pneumatic layer and air chambers, which allows gemmules to float in water bodies.
• Archaeocytes: Archaeocytes are specialised sponge cells with collected and spicule-like structural components. They migrate around the mesohyl in a manner akin to an amoeba, carrying out a variety of crucial tasks.
• Outer pneumatic layer: The endospore, covered by a layer of spicules and covers the gemmule's outer layer, protects it from other adverse environmental factors and aids in its development into an adult freshwater sponge.

Fly Life Cycle

Structure of Gemmule

• The interior mass of amoebic cells in gemmules, frequently shaped like a ball or a sphere, is surrounded by a thick outer layer of microscopic siliceous spicules.
• The Complex Structure of Gemmules comprises a Micropyle, a Spicule, an Inner Layer, Archaeocytes, and an Outer Pneumatic Layer.
• The peripheral layer of a gemmule consists of air chambers and a thick pneumatic layer. The cell's outer coat has a small hole that lets the gemmule float when submerged in water.
• The pointed spicule protects the gemmules from harm and provides them with structural support. The archaeocytes are in charge of reproduction.

Fossils Tracing Evolution

How are Gemmule Produced?

Frogs Morphology Anatomy

Characteristics of Gemmule

• Gemmules are resistant to desiccation brought on by weather, temperature, and other factors.
• Even in the coldest months of the year, they resist freezing throughout the winter.
• They can resist high oxygen deprivation due to their anoxia resistance.
• They resist deterioration, spoilage, and decay because they can endure prolonged dormancy.
• Gemmules resemble a bacterial endospore.
• They are made up of amoebocytes.
• A thin covering of spicules surrounds them for support and to keep predators away.
• The harsh climatic conditions that would even be sufficient to kill fully mature sponges are inadequate to degrade these gemmules.
• The gemmules don't begin to grow again until the environment has become less hostile.

Fragmentation