Lejek (anatomia)
Lejek (łac. infundibulum) – anatomiczna część międzymózgowia, proksymalnie będąca przedłużeniem guza popielatego, natomiast dystalnie przechodząca w tylny płat przysadki. Światło lejka łączy się z komorą trzecią – jest to tzw. zachyłek lejka. W lejku przebiegają aksony komórek nerwowych zlokalizowanych w jądrach nadwzrokowym i przykomorowym podwzgórza, które transportują i magazynują hormony wytwarzane w tych jądrach: wazopresynę i oksytocynę.
Bibliografia
- Anatomia człowieka. Przewodnik do ćwiczeń. Tom 4 – Centralny układ nerwowy i narządy zmysłów. Wrocław 2000.
- Maciej Zabel: Histologia. Podręcznik dla studentów medycyny i stomatologii. Wrocław: Wydawnictwo Medyczne Urban&Partner, 2000. ISBN 83-87944-61-0.
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Star of life, blue version. Represents the Rod of Asclepius, with a snake around it, on a 6-branch star shaped as the cross of 3 thick 3:1 rectangles.
Design:
The logo is basically unicolor, most often a slate or medium blue, but this design uses a slightly lighter shade of blue for the outer outline of the cross, and the outlines of the rod and of the snake. The background is transparent (but the star includes a small inner plain white outline). This makes this image usable and visible on any background, including blue. The light shade of color for the outlines makes the form more visible at smaller resolutions, so that the image can easily be used as an icon.
This SVG file was manually created to specify alignments, to use only integers at the core 192x192 size, to get smooth curves on connection points (without any angle), to make a perfect logo centered in a exact square, to use a more precise geometry for the star and to use slate blue color with slightly lighter outlines on the cross, the rod and snake.
Finally, the SVG file is clean and contains no unnecessary XML elements or attributes, CSS styles or transforms that are usually added silently by common SVG editors (like Sodipodi or Inkscape) and that just pollute the final document, so it just needs the core SVG elements for the rendering. This is why its file size is so small.
The Star of Life, medical symbol used on some ambulances.
Star of Life was designed/created by a National Highway Traffic Safety Administration (US Gov) employee and is thus in the public domain.Autor:
John A Beal, PhD
Dep't. of Cellular Biology & Anatomy, Louisiana State University Health Sciences Center Shreveport, Licencja: CC BY 2.5Human brainstem anterior view
- Gyrus rectus
- Bulbus olfactorii
- Tractus olfactorii
- Trigonum olfactorium
- Substantia perforata anterior
- Gyri orbitales
- Gyrus parahippocampalis
- Tractus opticus
- Chiasma opticum
- Nervus opticus
- Infundibulum hypophysialis
- Corpora mammillaria
- Substantia perforata posterior
- Fossa interpeduncularis
- Pedunculus cerebri
- Pons
- Sulcus basilaris
- Pedunculus cerebelli
- Sulcus bulbopontinus
- Oliva
- Pyramis medullae oblongatae
- Medulla oblongata, Fissura mediana anterior
A: Thalamus, B: Mesencephalon, C: Pons, D: Medulla oblongata
The Medulla, Pons & Midbrain are delineated here on the anterior surface of the brain.
In the Midbrain the massive right and left Cerebral Peduncles are seen. The two peduncles are separated by the Interpeduncular Fossa. Posteromedial central arteries enter the brain through the holes in the Posterior Perforated Substance located in the floor of the fossa. Cranial nerve III also enters the midbrain through this fossa.
Another important fact to note is that the pituitary gland was removed before this photo was taken. The infundibulum connects between the thalamus and pituitary.