Termite baiting is really a simple process, but can be confusing since there are so many bait products to choose from. The bottom line is that all termite bait systems work. Some take longer than others to achieve control.
The somatic mesoderm, which is adjacent to the ectoderm and amnion, gives rise to the bones, ligaments, blood vessels, and connective tissue of the limbs.
Ectoderm and endoderm are the primary embryonic germ layers which induce the two secondary germ layers, mesoderm and neural crest cells. Given the diverse structures made by neural crest cells, some consider it to be a fourth germ layer of the embryo, in addition to ectoderm, endoderm, and mesoderm.HE NEURAL CREST. A unique group of important embryonic cells called neural crest cells were a vertebrate innovation. Neural crest cells develop into a number of cell types including sensory neurons, adrenergic neurons, cholinergic neurons, Rohon-Beard cells, satellite cells, and glial cells.