Yolk sac

E. Pathology by systems

• Cardiovascular system
• Digestive system
• Endocrine system
• Genital system
  • Male genital system
  • Female genital system
  • Fetus and annexes
    • Umbilical cord
    • Placenta
    • Embryo and fetus
      • Embryological structures and processes
      • Normal embryo and fetus
    • Amnion and amniotic sac
• Locomotory system
• Nervous system
• Respiratory system
• Skin
• Urinary system