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From this reptile, three groups of amniotes would evolve: anapsids, diapsids, and synapsids. These broad groupings of amniotes are most easily differentiated by the presence and number of holes in the skull behind the eye socket. Those gaps, or holes, are called fenestrae, meaning "windows." The anapsids are the most primitive members of the group.
Fenestration or fenestrate may refer to: . Fenestration (architecture), relating to openings in a building Fenestra, in anatomy, medicine, and biology, any small opening in an anatomical structure
Matthäus Merian's impression of the 1618 Defenestration of Prague. Defenestration (from Neo-Latin de fenestrā [1]) is the act of throwing someone or something out of a window. [2]
Anatomical variations of the anterior communicating artery are relatively common. The artery is sometimes duplicated, multiplicated, fenestrated ("net-like") or very short, giving the impression that two anterior cerebral arteries are fused at the point where the anterior communicating artery is usually expected to arise.
Perforation seen in Monstera deliciosa. Perforate leaves, sometimes called fenestrate, occur naturally in some species of plants.Holes develop as a leaf grows. The size, shape, and quantity of holes in each leaf can vary greatly depending on the species and can even vary greatly within a given
The peptides released at the median eminence enter the primary plexus capillaries. From there, they are transported to the anterior pituitary via hypophyseal portal veins to the secondary plexus. The secondary plexus is a network of fenestrated sinusoid capillaries that provide blood to the anterior pituitary.
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A liver sinusoid is a type of capillary known as a sinusoidal capillary, discontinuous capillary or sinusoid, that is similar to a fenestrated capillary, having discontinuous endothelium that serves as a location for mixing of the oxygen-rich blood from the hepatic artery and the nutrient-rich blood from the portal vein.