allantois

Examples of allantois in the following topics:

• Characteristics of Amniotes

  • However, the eggs of amniotes contain three additional extra-embryonic membranes: the chorion, amnion, and allantois.
  • The allantois stores nitrogenous wastes produced by the embryo and also facilitates respiration.
  • The key features of an amniotic egg are the chorion, amnion, and allantois.

• Development of the Urinary System

  • The urinary bladder develops from the upper end of the urogenital sinus, which is continuous with the allantois.
  • The allantois degenerates and remains in the adult as a fibrous cord called the urachus (median umbilical ligament).

• Urinary Bladder Cancer

  • The human urinary bladder is derived in embryo from the urogenital sinus, and it is initially continuous with the allantois.

• Muscle Development

  • The cells of the inner cell mass (embryoblast), which are known as human embryonic stem cells (hESCs), will differentiate to form four structures: the amnion, the yolk sac, the allantois, and the embryo itself.