WebThe key differences between the synapsids, anapsids, and diapsids are the structures of the skull and the number of temporal fenestrae (“windows”) behind each eye ( (Figure) ). Temporal fenestrae are post-orbital openings in the skull that allow muscles to expand … Web1. notochord- flexible rod that provides support (becomes intervertebrate disks between vertebrae in adult humans) 2. dorsal hollow nerve cord- constitutes the central nervous system (brain and spinal cord) 3. Pharyngeal slits or pouches- open to the outside, function in feeding (non vertebrates), respiration (eg gills in fish); contribute to ear and neck in …
Zoology ch 18 Flashcards Quizlet
WebWhat is the difference between Synapsida and synapsids? Although Synapsida includes modern mammals, the term is most often used when referring to non-mammalian, non- therapsid synapsids. The synapsids are traditionally divided into a primitive group and an advanced group, known respectively as pelycosaurs and therapsids. WebAnapsids have no temporal fenestrae, synapsids have one, and diapsids have two. Anapsids include extinct organisms and may, based on anatomy, include turtles. However, this is still controversial, and turtles are sometimes classified as diapsids based on … chemist salary mn
Synapsid, anapsid, and diapsid skull types in a …
WebThe key differences between the synapsids, anapsids, and diapsids are the structures of the skull and the number of temporal fenestrae behind each eye . Temporal fenestrae are post-orbital openings in the skull that allow muscles to expand and lengthen. … WebSome diapsids have lost the lower bound of the lower temporal fenestra, the infratemporal, forming a portion of the cheek, but they do not become synapsids by consequence. This is because while the terms are morphofunctional, they are also phylogenetic: the word … WebAre birds diapsid synapsid or synapsid reptiles? So, this is the key difference between diapsid and synapsid. Most reptiles and all the birds are diapsids while most mammals are synapsids. Are birds archosaurs? archosaur, (subclass Archosauria), any of various reptiles, including all crocodiles and birds and all descendants of their most recent ... chemist salary michigan