The skeleton of the sponge is composed of a hard rod-shaped protrusion called a spicule and a protein called collagen. 11th. 2015 г.
What is the body of the sponge made of?
Anatomy: The body of the sponge has two outer layers separated by a cell-free (cell-free) gel layer called the mesohyl (also called the mesenchyme). The gel layer has needles (supporting needles made of calcium carbonate) or spongin fibers (flexible skeletal material made of protein).
What kind of body wall does the sponge have?
Pinacosite, an epithelial-like cell, forms the outermost layer of the sponge and surrounds a jelly-like substance called mesohyl. Mesohyl is an extracellular matrix consisting of collagen-like gels with floating cells that perform various functions. 2021
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Which animal does not sleep in its life?How do sponges coordinate their body functions?
