Search

The reproductive system is a key to survival of specie. The male reproductive system plays a vital role in the production, formation, maturation, and transportation of spermatozoa to the female specie. Little attention has been given to the male fetal reproductive system in Camelus dromedarius. The study was aimed to document the normal gross morphology of the male fetal one-humped dromedary. Forty-five (45) male fetal reproductive organs were used. The fetus age was determined classified into 3 trimesters. The foetuses were dissected from the xiphoid region through the abdominal wall to the preputial orifice to expose and examine the reproductive organs. Morphologically, the testicles were oblong, pale in color and located in the abdominal cavity at the first trimester, moved caudally with a condensing gubernaculum at the 2nd trimester. But did not descend into the scrotum at the third trimester. Ultimately, the testis did not descend before birth. The epididymis was close in contact with the testis throughout its fetal life. Vas deference coursed from the cauda epididymis to the prostate at the base of the bladder. The penis presented a cylindrical form at the first trimester. It was distinct into base, body and glans at the second trimester with a slight arc mid-way of its body. The sigmoid flexure was noted to be curlier at the third trimester. The reproductive organs of the male fetal Camelus dromedarius have some considerable differences from other domesticated animals especially the ruminants [ABSTRACT FROM AUTHOR]

This study was undertaken to document the normal features on gross morphology and morphometry of the olfactory brain and cerebral hemispheres of both sexes of African striped ground squirrel (Xerus erythropus) and to discuss the structure-function paradigm. The study was conducted by direct observation of ten (10) adult African striped ground squirrels comprising of five males and five females. The main morphological features were: a) a large club-shaped, non-pendulous olfactory bulb projecting from the cerebral hemispheres ventro-rostrally; b) cerebral hemisphere devoid of sulci and gyri; c) a well-developed corpus callosum connecting the cerebral hemisphere; and d.) a fornix which appeared as an arch shaped commissural fiber, consisting of a crus, a body and a commissure. Morphometric data values indicated that the males had statistically significant higher body and brain weights than the females. There was no significant statistical difference between sex in the mean values of the olfactory bulbs and cerebral hemispheres weight and dimensions (length and width). A significant statistical difference between sexes was reported with respect to the weight of the olfactory bulb (0.46 ± 0.03g in males and 0.32 ± 0.01g in females) and cerebral hemispheres width (1.87 ± 0.03cm in males and 1.79 ± 0.01cm in females). The well-developed corpus callosum and fornix, a very crucial organ in the function of formation and consolidation of memory, and the large size of the olfactory bulb, an organ for olfactory acuity supports the use of this rodent model for precise radio-tracking and identification of location. [ABSTRACT FROM AUTHOR]