Final answer:
Wharton's jelly is a type of tissue called mucous connective tissue, present in the umbilical cord during fetal development. After birth, only scattered mesenchymal cells remain throughout the body. Mucous connective tissue provides support and protection to the blood vessels in the umbilical cord.
Step-by-step explanation:
Wharton's jelly is a type of tissue called mucous connective tissue. It is present in the umbilical cord during fetal development. After birth, this tissue is no longer present and only scattered mesenchymal cells remain throughout the body. Mucous connective tissue or Wharton's jelly is a specialized loose connective tissue that provides support and protection to the blood vessels in the umbilical cord.