Allantois

{
  "id": "MLC-T-ENV-001074",
  "term": "Allantois",
  "field": "Environment",
  "definition": "A vascularized extra-embryonic membrane of amniote embryos that forms as a narrow outgrowth of the hind portion of the gut. In birds and reptiles, it stores waste products of embryonic metabolism. The allantois fuses with the chorion to form the chorio-allantoic membrane in birds and reptiles, and a part of the placenta in mammals.",
  "references": [
    "NOAA Coral Reef Glossary"
  ],
  "url": "https://mlchart.com/terminology/environment/allantois/"
}