Demosponges have siliceous spicules and a network of fibrous protein, spongir, that is similar to collagen. The demosponges are the source of natural household sponges, which are made by soaking dead sponges in shallow water until all the cellular material has decayed, leaving the spongin network behind.

Atop this many-drawered enormity was an additional set of drawers attached to a mirror.

He went to sleep, lying there under a wing of his plane, and presently Bland himself drifted off into dreams.

I don't care a fiddlestick!