Anamnia
Top
(a′nam·nē·ə)
(vertebrate zoology) Vertebrate animals which lack an amnion in development, including Agnatha, Chondrichthyes, Osteichthyes, and Amphibia.
Top
Those vertebrate animals, sometimes called Anamniota, which lack an amnion in development. The amnion is a protective embryonic envelope that encloses the embryo and its surrounding liquid, the amniotic fluid, during fetal life. An amnion is present in mammals, birds, and reptiles (collectively called the Amniota), but is absent in fishes and amphibians. See also Amnion; Amniota; Amphibia; Pisces (zoology).
Post a question - any question - to the WikiAnswers community:
Copyrights:
McGraw-Hill Science & Technology Dictionary
McGraw-Hill Dictionary of Scientific and Technical Terms. Copyright © 2003, 1994, 1989, 1984, 1978, 1976, 1974 by McGraw-Hill Companies, Inc. All rights reserved.
Read more