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.
Answered by The Community. Making the world better, one answer at a time. There are two openings to the digestive tract. The anterior opening of the digestive tract is the mouth or oral cavity, and the posterior opening of the digestive tract is the anus.here 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 peri â¦ stalisis e.g..teh circular muscle and the longitudinal muscles the outermost layer is a thin membrane known as the serous coat.