Histomorphology of the equine cervix.

The research article is about a detailed examination of the physical and cellular structure of a horse’s cervix using light microscopy techniques.

Objective of the Study

• The main purpose of this study was to look in detail at the epithelial morphology and the vascular structures of a horse’s cervix along the longitudinal and horizontal axis using light Microscopy.

Methodology

• The study was done using cervical tissue specimens that were taken from five different regions along the caudocranial (i.e., tail to head) axis of 10 healthy mares.
• The histological staining of these specimens was done using haematoxylin-eosin, azan as per Heidenhain, periodic acid-Schiff reaction, and resorcinfuchsin. These are all common techniques used to distinguish different types of cells and structures in histological samples.

Results

• An average epithelial cell height of 17.5 +/- 1.7 micrometres was measured, with differences observed in the various areas of the mucosal folds and along the longitudinal axis of the cervix. This means that the size of the endothelial cells varied depending on their location within the cervix.
• Three types of cells were identified based on their shapes and sizes.
• The researchers found that, unlike what previous research suggests, many cells had a free cell membrane that showed a clear border of kinocilia along the full length of the cervical canal. Kinocilia are small hair-like structures that help to move mucus and other substances along the surfaces of certain types of cells.
• The deep layers of the lamina propria mucosae showed pronounced vascularization (46.3 +/- 25.1 vessels/mm2). This part of the cervix was mainly made up of veins and venules. The lamina propria mucosae is a thin layer of loose connective tissue which lies beneath the epithelium and together with it, constitutes the mucosa.
• The authors hypothesize that this dense network of blood vessels might help to support the cervix’s ability to act as a barrier between the uterus and the external environment, possibly functioning as a type of cavernous body.