Prenatal and Histomorphological Development of Fungiform and Circumvallate Papillae in Local Awassi Sheep (Ovis aris)
Prenatal and Histomorphological Development of Fungiform and Circumvallate Papillae in Local Awassi Sheep (Ovis aris)
Rusul Thamer Ali*, Jafar Ghazi Abbas Al-Jebori
ABSTRACT
The purpose of the study was to examine the prenatal stages of the fungiform and circumvallate papillae in fetuses of Awassi sheep. Thirty male and female samples were taken from the uterus of healthy females, and the crown rump length formula (CRL) was used to classify the samples into four age groups for the prenatal stage. the first age (50-55) days of gestation, the tongue at this stage where appeared whitish or colorless and opaque in appearance with small in size relatively compare with the advanced stages with irregular and an uneven dorsal surface, and this surface was smooth and lingual papillae could not be observed neither by naked eye. Histological observations showed that the tongue at this age has three layers: tunica mucosa with primitive of lingual papillae, undifferential mesenchymal tissue (pluripotiantial tissue) and tunica muscularis. while; At (70-75) days of gestation the tongue more developed with advancement of gestation appeared rough showing beginning of formation of lingual papillae. While histology; that the growth of the lingual papillae depends on the time of forming the stratified squamous epithelium. Typically show initial sings of formation to some papillae (fungiform and circumvallate papillae), they may not be fully development. At third trimester of gestation (100-105 days and 130-140days), the tongues were pinkish with prominent lingual papillae were evident and appearance of taste buds formation was clear.
Keywords | Development, Fetuses, Fungiform, Circumvallate papillae, Prenatal, Sheep
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November 2024
Vol. 12, Sp. Iss. 1
