Pinacoderm

The pinacoderm is the outermost layer of body cells (pinacocytes) of organisms of the phylum Porifera (sponges), equivalent to the epidermis in other animals.

Structure

The pinacoderm is composed of pinacocytes, flattened epithelial cells that can expand or contract to slightly alter the size and shape of the sponge.[1] It also contains porocytes, oval-shaped cells extending from the pinacoderm to the choanoderm (the body layer containing choanocytes).

gollark: Really? Running wires to all the traffic lights sounds like it'd be annoying.
gollark: Actually, hmm, it must have some kind of 3G connectivity to reach that.
gollark: I see. Hopefully it doesn't somehow still retain access to whatever system issues tickets.
gollark: What data do the traffic cameras provide?
gollark: That doesn't sound very useful unless you somehow also have access to some traffic lights.

References
  1. Charles F. Lytle and John R. Meyer (2005). General Zoology Laboratory Guide (Fourteenth ed.).CS1 maint: uses authors parameter (link)


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