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The primate median eminence II
- Source :
- Cell and Tissue Research. 175
- Publication Year :
- 1976
- Publisher :
- Springer Science and Business Media LLC, 1976.
-
Abstract
- The ultrastructure of the normal median eminence of the male rhesus monkey (Macaca mulatta) is described using high-voltage electron microscopy. Surface specializations of ependymal cells lining the infundibular recess included cilia, apical extrusions, and microvilli. Supraependymal cells were predominantly macrophage-like, but examples of lymphocytic types were also seen. Tanycytes had long, branching, basal processes filled with numerous microtubules, some lipid droplets, and granules. The zona interna was composed of large unmyelinated neurosecretory fibers. A few myelinated fibers were also seen, but their character as neurosecretory fibers could not be established. The zona externa was composed of densely-packed profiles of neuro secretory fibers of small diameter, was well-vascularized and contained the terminations of tanycytes. Perivascular glial cells, vesiculated elements, pituicytes, and cellular elements common to connective tissue were observed. The intricate relationships between both the cellular and fibrous elements of the median eminence can be appreciated with the capability of high-voltage electron microscopy to discern ultrastructure in sections 10 times thicker than those used for low-voltage electron microscopy. The median eminence of this primate species has an ultrastructural organization similar to that described for most other species.
- Subjects :
- Male
Hypothalamo-Hypophyseal System
Histology
Ependymal Cell
Chemistry
Median Eminence
Connective tissue
Haplorhini
Cell Biology
Anatomy
Macaca mulatta
Pathology and Forensic Medicine
law.invention
Microscopy, Electron
medicine.anatomical_structure
Transmission electron microscopy
law
Ependyma
Median eminence
Ultrastructure
medicine
Animals
Electron microscope
Neurosecretion
High voltage electron microscopy
Subjects
Details
- ISSN :
- 14320878 and 0302766X
- Volume :
- 175
- Database :
- OpenAIRE
- Journal :
- Cell and Tissue Research
- Accession number :
- edsair.doi.dedup.....c275d7dce541b257497a72f4127b85da