The Illinois state sales tax rate is 6.25%, and the average IL sales tax after local surtaxes is 8.19%. Counties and cities can charge an additional local sales tax of up to 3.5%, for a maximum possible combined sales tax of 9.75%.
(clue: look up Hirschsprung's disease.) The first important step in development of the digestive system occurs during folding of the embryonic disc as neurulation takes place (weeks 4 and 5) - the thin endodermal layer is gathered up' inside the embryonic body to form a tubular structure. Gut tube, respiratory diverticulum, yolk sac, and allantois.
Making the world better, one answer at a time. there are four layers in the digestive tract: the inner most layer is the mucosal layer. the second is the sub-mucosal layer. then cones the muscular layer responsible for peristalisis e.g..teh circular muscle and the longitudinal muscles. the outermost layer is a thin membrane known as the serous coat.