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KINGDOM : ANIMALIAThe Sponges

Kingdom Animalia(Metazoa)

1. Mesozoa2. Parazoa3. Eumetazoa

Mesozoa

1. Phylum Mesozoa

Mesozoa

Parazoa

1. Phylum Placozoa2. Phylum Porifera : Sponges

Trichoplax adhaerens

Sponges

1. Ostia2. Oscula3. Spicule4. Spongin

Spicule

Spicule

Spongin

Types of Cells

1. Mesohyl2. Pinacocyte3. Myocyte4. Choanocyte5. Archaeocyte / Sclerocyte /

Spongocyte6. Collencyte / Lophocyte

Types of Cells

Choanocyte

Types of Canal Systems

1. Asconoid 2. Flagellated Spongocoels

/Leucosolenia3. Syconoid 4. Flagellated Canals/ Sycon5. Leuconoid 6. Flagellated

Chambers/Euspongia

Types of Canal Systems

Wall of sponge Sycon

Radial canals

Sponge Physiology

Intracellular Digestion

Sponge Reproduction

1. External Bud2. Internal Bud / Gemmule3. Viviparous4. Sperm / Oocyte5. Oviparous6. Regeneration and Somatic

Embryogenesis

Gemmule

Gemmule

Sponge Classification

1. Class Calcarea / Sycon / Leucosolenia

2. Class Hexactinellida / Euplectella

3. Class Demospongiae / Spongilla4. Class Sclerospongiae

Development of Demosponges

Glass Sponge Skeleton

Euplectella

Venus Flower Basket Sponge

A building like Euplectella

Glass Sponge Spicules

Spongilla

Spongilla

Bath Sponge

Types of Spicules & Sponges