Sponges have two germ layers therefore they are diploblastic.
Undifferentiated mesenchymal tissue
Ectoderm, endoderm, and mesoderm can produce epithelial tissues
cellular differentiation
Yes, all connective tissues arise from the mesenchyme, which is a common embryonic tissue derived from the mesoderm germ layer. Mesenchyme has the ability to differentiate into various types of connective tissues, such as bone, cartilage, and blood.
The ectoderm nearest the embryonic midline - often described as the neuroectoderm - does form into the neural tube, the embryonic structure from which the nervous system develops. However, more lateral ectoderm matures into skin and associated tissues.
Totipotent embryonic cells have the potential to differentiate into any cell type in the body, including both embryonic and extraembryonic tissues.
Embryonic stem cells are used to treat a variety of diseases. Stem cells also help organs and tissues repair themselves.
a tough-coated dormant cluster of embryonic cells produced by a freshwater sponge for development in more favorable conditions
a tough-coated dormant cluster of embryonic cells produced by a freshwater sponge for development in more favorable conditions
Embryonic ectoderm develops into tissues like skin, nervous system (brain and spinal cord), and sensory organs (eyes and ears).
Yes, most connective tissues arise from mesenchyme, an embryonic tissue. Mesenchyme gives rise to fibroblasts, which then differentiate into various types of connective tissue cells and produce the extracellular matrix. However, some specialized connective tissues like blood and lymph do not directly arise from mesenchyme.
No, different tissues in the body originate from various germ layers during embryonic development. For example, ectoderm gives rise to skin and nervous tissue, mesoderm to muscle and bone, and endoderm to the lining of the digestive tract.