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There are four types of amniote skull, classified by the number and location of their temporal fenestrae. Though historically important for understanding amniote evolution, some of these configurations have little relevance to modern phylogenetic taxonomy.
Retinal blood vessels that are similar to cerebral blood vessels maintain the inner blood-ocular barrier. This physiological barrier comprises a single layer of non-fenestrated endothelial cells, which have tight junctions. These junctions are impervious to tracer, so many substances can affect the metabolism of the eyeball.
Nevertheless, in the liver, the fenestrated endothelium of hepatic sinusoids allows for direct contact between CD8 + T-cells and the hepatocytes. [ 44 ] In case of viral or bacterial infection of hepatocytes, platelets have been observed to form clusters within the sinusoids of the liver and adhere to the surface of infected Kupffer cells .
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.
The blood–ocular barrier is a barrier created by endothelium of capillaries of the retina and iris, ciliary epithelium and retinal pigment epithelium. [1] It is a physical barrier between the local blood vessels and most parts of the eye itself, and stops many substances including drugs from traveling across it. [2]
Fieldnotes refer to qualitative notes recorded by scientists or researchers in the course of field research, during or after their observation of a specific organism or phenomenon they are studying. The notes are intended to be read as evidence that gives meaning and aids in the understanding of the phenomenon.
Non-linguistic (or pre-linguistic) meaning is a type of meaning not mediated or perceived through linguistic signs.. In linguistics, the concept is used in discussions.It is whether about such meaning is different from meaning expressed through language (i.e. semantics), It is also Interesting, should play a role in linguistic theory, or to which extent thought and conceptualization is ...
Australian and New Zealand Standard Research Classification (ANZSRC 2008) Chapter 3 and Appendix 1: Fields of research classification. Fields of Knowledge, a zoomable map allowing the academic disciplines and sub-disciplines in this article be visualised. Interactive Historical Atlas of the Disciplines, University of Geneva