Amniote - Wikipedia
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".
Amniotes - Definition, Characteristics and Evolution - Biology …
2019年4月17日 · 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 amnion can be found within the egg, as in lizards and birds, or the amnion can simply enclose the fetus within the uterus.
Amniote Definition & Meaning - Merriam-Webster
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 | Vertebrates, Tetrapods & Mammals | Britannica
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 …
29.4A: Characteristics of Amniotes - Biology LibreTexts
2023年10月31日 · Key Points. The amniotes include reptiles, birds, and mammals; shared characteristics between this group include a shelled egg protected by amniotic membranes, waterproof skin, and rib ventilation of the lungs.
The Animal Encyclopedia: Amniotes - Amniota - ThoughtCo
2018年1月31日 · 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 terrestrial environment. The amniotic egg generally consists of four membranes ...
15.13: Introduction to Amniotes - Biology LibreTexts
2021年2月28日 · Amniotes are a clade of tetrapod vertebrates comprising the reptiles, birds, and mammals. Amniotes are characterized by having an egg equipped with an amnion, an adaptation to lay eggs on land or retain the fertilized egg within the mother.
Introduction to Amniotes | Biology for Majors II - Lumen Learning
Amniotes are a clade of tetrapod vertebrates comprising the reptiles, birds, and mammals. Amniotes are characterized by having an egg equipped with an amnion, an adaptation to lay eggs on land or retain the fertilized egg within the mother.
15.4: Introduction to Amniotes - Biology LibreTexts
2021年2月28日 · Amniotes are a clade of tetrapod vertebrates comprising the reptiles, birds, and mammals. Amniotes are characterized by having an egg equipped with an amnion, an adaptation to lay eggs on land or retain the fertilized egg within the mother.
Introduction to the Amniota - University of California Museum of ...
This kind of egg is unique to the amniotes, a group that includes two large clades: Synapsida (mammals and their relatives) and Diapsida (reptiles, dinosaurs, and birds). Amniota also includes a few odd groups, like turtles, whose relationships are murky.