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Porifera

Vocab for sponges

TermDefinition
Branch Individual divisions of sponge body
Ectoderm Outer layer of sponge; acts like epidermis; protects and supports
Pinacocyte Plate-like cells that make up the ectoderm of the sponge
Endoderm Inner layer of sponge body; lines the spongocoel
Choanocytes Collared cells with flagellum; move water to help to obtain nutrients; function in reproduction
Mesohyl Jelly-like matrix found between the endoderm and ectoderm; made by collenocytes
Spicule Needle-like structures that provide skeletal support of sponge; made of calcium carbonate, spongin or silicon
Ostia Pores on the surface of sponge body; bring water into the central cavity
Holdfast Holds sponge to substrate surface
Spongocoel Central cavity of the sponge
Osculum Opening at the top of the sponge; water exits through the osculum
Porocyte Cells that make up the ostia; may open or close the pore
Amoebocyte Cell in mesohyl; responsible for engulfing and digesting food particles
Created by: mrbstp
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