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allantois    
n. 尿膜

尿膜

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  • Allantois - Wikipedia
    The allantois, along with the amnion, chorion, and yolk sac (other extraembryonic membranes), identify humans and other mammals, birds, and reptiles as amniotes
  • Allantois | Embryonic, Development, Sac | Britannica
    allantois, an extra-embryonic membrane of reptiles, birds, and mammals arising as a pouch, or sac, from the hindgut In reptiles and birds it expands greatly between two other membranes, the amnion and chorion, to serve as a temporary respiratory organ while its cavity stores fetal excretions
  • Allantois - Definition, Function and Quiz | Biology Dictionary
    The allantois is one of the four main membranes that surround an embryo It is found near the posterior of the embryo, since that’s where its development begins
  • The Allantois: Development, Function, and Comparative Anatomy
    The allantois is an essential embryonic structure in the development of amniotes, including reptiles, birds, and mammals It plays a role in waste management, gas exchange, and the formation of important anatomical structures
  • ALLANTOIS Definition Meaning - Merriam-Webster
    The meaning of ALLANTOIS is a vascular fetal membrane of reptiles, birds, and mammals that is formed as a pouch from the hindgut and that in placental mammals is intimately associated with the chorion in formation of the placenta
  • Allantois - an overview | ScienceDirect Topics
    The allantois is defined as a structure derived from splanchnopleure that arises as a diverticulum of the hindgut, gradually filling the extraembryonic coelom and playing a role in vascularizing the chorion and amnion in various species
  • Allantois: Structure, Function Importance in Biology - Vedantu
    The allantois is a hollow sac-like structure that is filled with transparent fluid, which is part of the concept of developing an amniotic membrane The allantois is also known as allantoic
  • Allantois - GeeksforGeeks
    Allantois is a tube-like structure of the yolk sac that helps to remove the nitrogenous waste materials from the embryo It is the mid-layer of the placenta and the blood vessels that originate from the umbilicus traverse
  • The Allantois: A Key Structure in Early Development
    The allantois is an extra-embryonic membrane that forms during the early stages of development, specifically around the third week of human embryogenesis It originates from the epiblast layer, which gives rise to the three primary germ layers of the embryo





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