羚牛(Budorcas taxicolor)部分脏器特点的观察

本文对2只羚牛的雌性生殖器官及肝、肾、脾等脏器进行了形态描述,并与黄牛及羊的相应器官进行了比较,为探讨羚牛的分类地位提供了解剖学资料。

OBSERVATIONS ON SOME VISCERAL ORGANS IN THE TAKIN

The shape of the ovarium, tuba uterina, uterus, vagina, liver, kidney and spleen of the takin were observed with the naked eye. The results are as follows:The ovarium of the takin is elliptical, somewhat compressed and has no ovulation fossa. The size of ovaria is smaller in takin than that in cow and similar to that in sheep. Right ovary is 1.8cm in length, 1.2cm in width and 1.1cm in thickness in its largest part.Left ovary is 1.5cm in length,1.1cm in width and about 0.8cm in thickness in its largest part.The tuba uterinae of takin is 20cm in length and less flexuous than that in cow. The boundary between the tuba uterina and the horn of the uterus is not quite distinct.The type of uterus of takin is bihorn. The horn of uterus of takin is 25cm in length and has the same curvature as that in cow. The body of pseudo-uterus is less typical in takin than that in cow or sheep.The body of uterus is about 2cm in length and the cervix about 4cm.The uterine caruncle is round eminences and there is a depression at the centre of its free surface.The lumen of the uterine cervix is closed by reciprocal eminences and depressions of the uterine mucous membrane.The margin of the external orifice of the uterus is formed by five round eminences of the uterine mucous membrane.The vagina is 22cm in length and 7cm in diameter. Eight round eminences formed by vagina membrane,are located about 1cm behind the external orifice of uterine cervix, circularly arranging surround the internal wall of the vagina. Hymen develops very well and is divided into three parts, a central part and two lateral parts. The central part is circular and 1.2cm in diameter, the lateral parts are laminary and about 3cm in length.The liver weight is about 1300g. The lobation of the takin liver is more distinct than that of cow.The gall bladder prolapses and is over right margin of liver.Its long axis is perpendicular to that of liver. The incisura of ligamentum teretis of liver is deeper in takin than that in cow.The kidneys are bean-shaped. The type of kidney is monopapillar, smooth and without any superficial lobation. Right kidney weight is 220g and is 11cm in length,7cm in width and 6cm in thickness. Left kidney weigh 243g and is 9.5cm in length, 7.5cm in width and 6cm in thickness.The spleen is hyacinth-bean in form and weigh 150g, it is 15cm in length and 11cm in width. Its margin is thin and central part thick, its thickest part measures 2.5cm.The observations were obtained from out-of-body organs of one young and one adult female takins. As all the organs were removed with formalin, it is certain that there are differences in size, weight etc. in the specimens compared with the fresh ones.