The term amniote comes from the amnion, which derives from Greek ἀμνίον (amnion), which denoted the membrane that surrounds a fetus. The term originally described a bowl in which the blood of sacrificed animals was caught, and derived from ἀμνός ( amnos ), meaning "lamb".

Apr 17, 2019 · Amniotes Definition. Amniotes are vertebrate organisms which have a fetal tissue known as the amnion.The amnion is a membrane derived from fetal tissue which surrounds and protects the fetus.

The meaning of AMNIOTE is any of a group (Amniota) of vertebrates that undergo embryonic or fetal development within an amnion and include the birds, reptiles, and mammals.

Amniota, a group of limbed vertebrates that includes all living reptiles (class Reptilia), birds (class Aves), mammals (class Mammalia), and their extinct relatives and ancestors. The amniotes are the evolutionary branch (clade) of the tetrapods (superclass Tetrapoda) in which the embryo develops within a set of protective extra-embryonic membranes—the amnion, chorion, and …

Jun 30, 2024 · Recent discoveries continue to expand our understanding of amniote evolution. Fossilized remains provide glimpses into ancient ecosystems and the diversity of species that once roamed the Earth. Studying these fossils allows scientists to piece together the puzzle of life’s history on our planet.

Jan 31, 2018 · Amniotes (Amniota) are a group of tetrapods that includes birds, reptiles, and mammals. Amniotes evolved during the late Paleozoic era.The characteristic that sets amniotes apart from other tetrapods is that amniotes lay eggs that are well-adapted to survive in a …

Amniote embryos, whether laid as eggs or carried by the female, are protected and aided by several extensive membranes. In eutherian mammals (such as humans), these membranes include the amniotic sac that surrounds the fetus.

Feb 28, 2021 · Amniote embryos, whether laid as eggs or carried by the female, are protected and aided by several extensive membranes. In eutherian mammals (such as humans), these membranes include the amniotic sac that surrounds the fetus.

Sep 23, 2022 · Amniote in the largest biology dictionary online. Free learning resources for students covering all major areas of biology.

The 'invention' of the cleidoic egg, and its embryonic membranes, is the main reason why the eggs of an amniote do not need to be laid in water. Thus, as distinct from the amphibians, amniotes are truly terrestrial. Secondarily, many reptiles and mammals returned to water, and mammals bear the young live, as do some reptile groups.