Wounding response in Porifera (sponges) activates ancestral signaling cascades involved in animal healing, regeneration, and cancer | Scientific Reports
Why are poriferans referred to as having a cellular grade of body construction despite being multicellular organisms? - Quora
The porifera and coelentera . cases it must be considered as a normal featiue of certainspecies (Evans, 1899). Union between the spicules is effected either by means offibrous tissue or by spongin.
The porifera and coelentera . sac-like body, and also the tentacles andperistome are always composed of three layers of tissue, of whichtwo, the external layer or ectoderm, and the internal layer orendoderm,
Porifera - Animal Phylums
Porifera Characteristics, Body Plans & Circulatory Systems | Study.com