A unique intraorbital osseous structure in the large fruit-eating bat (Artibeus lituratus)     

Machado M  dos Santos Schmidt EM  Margarido TC  Montiani-Ferreira F 《Veterinary ophthalmology》2007,10(2):100-105

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黄鳝排尿器官的解剖学研究     

曾增  刘希彬  吴峻岩  李琦  谢从新  杨春 《华中农业大学学报》2002,21(1):72-76

应用铸型技术等方法研究了黄鳝排尿器官的解剖学结构。结果见到,黄鳝2条中肾管在中肾末端与所谓退化性腺（亦即膀胱）相连,并与该“退化性腺”之间存在着明显的通道关系,而“退化性腺”直接通于尿孔。此外,组织学的研究也支持了解剖学结果,并证实中肾管在“退化性腺”中存在着2种开口类型;单口型和双口型。研究结果为作者先前提出的有关黄鳝“退化性腺”是膀胱的结论提供了直接的形态学证据。  相似文献   

湖北白猪Ⅲ系额窦发育的解剖观察     

秦春圃 《华中农业大学学报》1986,(1)

猪额窦的发育与其年龄的增长成正相关。湖北白猪Ⅲ系的额窦发育也遵循这一规律。它在胎儿期,额骨的鼻额部汉是一层柔软骨板,出生后形成骨松质,到15公斤体重时,骨松质开始形成小腔室,30公斤体重时,形成主窦和许多侧窦,以后主窦加大并向后伸展,侧窦逐渐融合与主窦相通,到90—120公斤体重阶段,主窦和侧窦合并向额骨后端伸展,到达两眼眶后缘的连线。随着年龄的增长还可扩大到顶骨。在这一进展的过程中,通城猪(早熟品种)额窦发育最快,长白猪的较慢,湖北白猪Ⅲ系则界于两者之间,这与它全身发育界于两者之间是一致的。说明额窦的发育与品种的成熟程度有密切关系。从这一点出发,也可看出湖出白猪Ⅲ系生长发育的成熟程度界于两者之间而偏早熟。它属于优良的瘦肉猪新品种之一。  相似文献   

龙须草叶的形态解剖特征   总被引：1，自引：0，他引：1  

张友德  胡德林 《华中农业大学学报》1993,12(1):74-79

龙须草叶由叶片和叶鞘组成。叶片狭长条形,均长80—120 cm,最长可达2m以上,均宽0.35cm。叶片中间薄,两侧厚,横切面呈长蜂腰状,两者在禾本科中实属罕见。上表皮泡状细胞集中在中脉两侧,数量很少。叶脉维管束鞘细胞为较大的薄壁细胞,内含多数较大的叶绿体,与其外厨叶内细胞构成“花环型”,属C_4植物特征,叶鞘中脉处厚,两侧渐薄,鞘肉中通气组织很发达。  相似文献   

中华通草蛉雄性生殖系统的解剖学研究     

陈天业  牟吉元 《昆虫天敌》1995,17(4):165-166

本文报道中华通草蛉雄性生殖系统的解剖学特征,并与其它种类作了比较。  相似文献   

SILVER IMPREGNATION IN SITU     

Jack  Boyd  PhD  BVMS  Norman W.  Rantanen  DVM  MS† 《Veterinary radiology & ultrasound》1984,25(5):220-226

In evaluating radiographs of the limb joints and head, students encounter difficulty where superimposition occurs. By replacing calcium with silver salts in the bone, enhanced radiopacity can be produced. In this study, silver impregnation was used to increase the radiopacity of individual carpal and tarsal bones, selected bones of the skull and the sinuses, and guttural pouch of the horse. This provides an interpretation aid for teaching radiographic anatomy of these regions.  相似文献   

被毛突变小鼠解剖及繁殖学特性观察   总被引：2，自引：1，他引：1  

李善如  遇秀玲  王冬平  吴娜  李吉庆  李润芳  郑亚萍  朱士恩  张忠诚  陈永福 《中国兽医学报》2000,20(1):92-96

对一种新的具有个毛、无毛、稀毛３种表型的被毛突变小鼠的大体解剖学特性研究结果表明,其心肝、脾、肺、肾、肾上腺等脏器的位置、形态及组织学结构无表型间差异,但无毛小鼠被毛和皮肤结构异常,大多数脏器的重量和脏器系数表现出表型差异和性别差异（Ｐ〈０．０５或Ｐ〈０．０１）。繁殖学特性研究结果表明,虽然无毛小鼠雌雄生殖系统的器官组成、发情周期与其他２种表型之间无明显差异,但其雄性的初情期明显滞后（约２周左右）  相似文献   

RADIOGRAPHIC ANATOMY OF THE CRIBRIFORM PLATE (LAMINA CRIBROSA)     

Tobias  Schwarz  MA  Dr. Med. Vet.  Martin  Sullivan  BVMS PhD  Klaus  Hartung  Prof. Dr. Med. Vet 《Veterinary radiology & ultrasound》2000,41(3):220-225

The radiographic appearance of the cribriform plate was investigated in 16 canine cadaver heads. The cribriform plate appeared as a "V"-shaped multilinear bone-opaque stripe in the caudal nasal region in projections perpendicular to the hard palate in 6 dogs with a skull index between 50.00 and 54.00. In 9 dogs with a skull index between 55.40 and 74.40, the cribriform plate had a more "C"-shaped and sharp appearance. In vertically oblique projections with an obliquity greater than 20 degrees, the cribriform plate lost its sharp outline and finally (40 degrees) disappeared. In lateral projections the cribriform plate appeared as a "C"-shaped interrupted bone-opaque stripe in all 16 dogs. In more brachycephalic dogs frontal bone structures superimposed on the cribriform plate on ventrodorsal and dorsoventral views and accentuated the radiographic appearance of the plate. Vertically oblique views separated both structures to produce two lines.  相似文献   

SONOGRAPHIC ANATOMY OF THE PALMARODISTAL ASPECT OF THE EQUINE DIGIT     

GÉRALDINE BOLEN  VALERIA BUSONI  OLIVIER JACQMOT  FRÉDÉRIC SNAPS 《Veterinary radiology & ultrasound》2007,48(3):270-275

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CARDIOVASCULAR AND GASTROINTESTINAL RADIOGRAPHIC CONTRAST STUDIES IN THE HORSESHOE CRAB (LIMULUS POLYPHEMUS)     

TIM SPOTSWOOD  STEPHEN A. SMITH 《Veterinary radiology & ultrasound》2007,48(1):14-20

Survey and contrast radiographic studies of the cardiovascular and gastrointestinal systems of the American horseshoe crab (Limulus polyphemus) were undertaken using conventional and flouroscopic techniques. Normal gastrointestinal and cardiovascular structures were difficult to resolve on survey radiographs, but were well visualized with gastrointestinal follow through studies and angiography, respectively. All three contrast agents (iohexol, Gastrografin, and barium sulfate) used for the gastrointestinal studies varied minimally in their radiographic quality and transit times, and all appeared to be safe for use in the horseshoe crab.  相似文献