What's the difference between spongin and spongoblast?
Spongin
Definition:
(n.) The chemical basis of sponge tissue, a nitrogenous, hornlike substance which on decomposition with sulphuric acid yields leucin and glycocoll.
Example Sentences:
(1) In situ hybridization using EmC4 cDNA and electron microscopy suggested that the cells expressing these genes were secreting spongin, a non-fibrillar, surface collagen of these sponges.
(2) Calcareous particles present in Pacific waters at depths of 50 to 3500 meters were collected by filtering seawater through spongin matrix.
(3) Spherulous cells are large and tightly packed in the outer layer of the ectosome and in the meshwork of the spongin fibres of the central axis.
Spongoblast
Definition:
(n.) One of the cells which, in sponges, secrete the spongin, or the material of the horny fibers.