The digestive system contains all four major tissue types, epithelial<span>, connective, muscle and nervous. e</span>pithelial<span> tissue lines the entire length the digestive tract. it is made up of many different types of cells, including goblet cells that secrete mucus.</span>
Yes. Animals and humans have instincts. Every creature does. Most of the time offspring are born in populations that are thriving so their young and their genes can be passed on.
