共查询到19条相似文献,搜索用时 171 毫秒
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青海沙蜥红原亚种的骨骼系统解剖及分类意义探讨 总被引:1,自引:0,他引:1
采用透明骨骼染色法,观测到了青海沙蜥红原亚种雌体比较完整的骨骼系统,为沙蜥属的分类及演化提供骨骼方面的资料.其特征是高颅型头骨,眼窝完整;颈椎8枚,躯椎13枚,荐椎2枚,尾椎多于21枚.我们第1次详细描述了眶间隔,鼻甲软骨,耳柱骨软骨部分等结构,并且在硬骨系统中也对以往的沙蜥骨骼系统有所补充:在前肢肱骨与尺骨间的韧带内,存在1块小骨,这块骨对应于后肢髌骨的位置,我们暂时称之为肘骨.在前肢腕骨与掌骨的腹面,有1块平面方形的骨骼,位于连接腕骨与各掌骨的韧带中间,我们暂时称之为垫骨. 相似文献
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小动物是鲫鱼、蛙、蜡除、蛇、家鸽、白鼠、小兔(小于1000g)等,这些小动物的骨骼比较细小脆弱,在制作过程中容易脱落或断裂,不易串接复位。介绍一种简便易行快速的制作方法。问川。动物的处理用放血的方法杀死动物,剥皮去脏,(注意;切勿损伤骨骼)剪除大块肌肉(各关节囊保留,不得剪断),在较大的骨块两端钻出通孔,再用注射器吸水冲洗出骨髓。(2)用氢氧化钾(K()H)腐蚀肌肉与脱脂先用0·5/~1%K()H水溶液浸泡骨骼3~4天,取出骨骼用水冲洗后,剪去较大块的肉(关节囊不剪)。换新的O·5%~1%KOll液再浸泡脱脂4~5… 相似文献
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Yilmaz H Baykara I 《Anthropologischer Anzeiger; Bericht über die biologisch-anthropologische Literatur》2008,66(2):147-153
An os trigonum is a small, round bone situated just behind the ankle joint. Clinical research shows that the os trigonum is present in about 5-15 % of normal feet. It occurs when one part of the bone does not fuse with the rest of the talus during growth. The present study is made on the skeletons, which were found in the Karagündiiz, Dilkaya and Van Kalesi-Eski Van Sehri settlements, Van province, Anatolia, dated in the Middle Ages. In this study 228 skeletons were examined, 120 males and 108 females. 376 tall were studied: 227 from Karagiindtiz, 93 from Dilkaya, and 56 from Van Kalesi-Eski Van Sehri. The percentage of the os trigonum syndrome was recorded as 6.6 %. 相似文献
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The development of the os penis in normal male rats and the os clitoridis in the females treated with testosterone were studied histologically and histochemically. Alcian blue-positive materials, alkaline phosphatase activities and calcium deposit were detected. The os penis of the rats was composed of a proximal segment and a distal one. The proximal segment of the os penis was formed by the fusion of a membrane bone in its distal half and an ossifying hyaline cartilage in its proximal half. The distal segment of the os penis developed as a fibrocartilage bone.
Two steps were demonstrated in the development of the os penis: the formation of the rudiments, and the differentiation of the proximal and distal segments. The treatment of newborn females with testosterone induced an os clitoridis homologous to the proximal segment of the os penis. The development of the os clitoridis was compared with that of the os penis. 相似文献
Two steps were demonstrated in the development of the os penis: the formation of the rudiments, and the differentiation of the proximal and distal segments. The treatment of newborn females with testosterone induced an os clitoridis homologous to the proximal segment of the os penis. The development of the os clitoridis was compared with that of the os penis. 相似文献
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Hans C. Bjerring 《Acta zoologica》1998,79(1):51-67
The human temporal bone includes an upper and a lower allostotic component, which are referred to, respectively, as the pars squamosa and pars tympanica in the adult and as the os squamosum and os tympanicum in the fetus. The consensus is that the former is descended from a cheek bone and the latter from a jaw bone in piscine osleolepipods. However, no corroborating evidence supports this view. It is concluded here that both these allostotic components of the human temporal bone derive from spiracular allostoses, except for the zygomatic process of the pars squamosa, this being a cheek allostosis that has been secondarily united with the squama. This is the first recognition of erstwhile spiracular allostoses in tetrapods. These conclusions challenge the widely accepted Reichert-Gaupp theory as well as the oft-alleged monophyletic status of the mammals and their derivation from therapsid reptiles. 相似文献
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T W Phenice 《American journal of physical anthropology》1969,30(2):297-301
Preliminary investigation has indicated that the use of the ventral arc, subpubic concavity, and medial aspect of the ischio-pubic ramus as sexing criteria allows one to sex the os pubis with an accuracy in excess of 95%. The method described here is simple and objective enough to allow the beginning researcher to sex hip bones accurately while requiring the presence of only a small fragment of the bone. 相似文献
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B E Anderson 《American journal of physical anthropology》1990,83(4):449-458
The ventral arc is a ridge of bone which may occur on the ventral surface of the corpus of the os pubis in adult females. Recently, this feature of the human public bone has regained attention as being of value in ascribing sex. The ventral arc should not be confused with a somewhat similar crest that can occur in adult males, which is characterized by a different position and configuration than that of the ventral arc. The corpus is the site of both muscular and ligamentous attachments. The tissues correlated with adult bony morphology and its development in females and males during growth are described. The primary research question addresses the factors involved in the determination of bony differences between the sexes. Sexual dimorphism in bony features of the ventral aspect of the human os pubis relates to muscular origin and to differential growth patterns between males and females. 相似文献
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四川资阳人遗址因人类头骨化石的发现而备受关注,但该遗址1951年出土的唯一一件有机质工具——骨锥却鲜被提及。该骨锥长度约为10 cm,距今超过7500年。本文利用体视显微镜、扫描电镜能谱和激光元素仪等技术手段,对这件骨锥的形态、原料选择、制作技术、使用与废弃过程及锥尖部的红色残留物进行了观察分析。研究结果显示,骨锥的制作原料取自大型鹿类胫骨骨干;主要采用刮削技术制作而成,但刮削痕迹并不规整,推测制作者更侧重器型的规整和对称;锥尖部的磨圆、抛光和横向擦痕可能是穿孔过程中产生的,其工作对象主要应为兽皮等软性材料。值得注意的是,锥尖部还发现有赭石粉末残余,表明当时的人类已经掌握了利用赭石处理皮毛及缝制衣物的技术。资阳骨锥应是中国史前规范骨器中一器多用的典型例证,也是中国首次发现的沾染赭石的有机质工具。 相似文献
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Histomorphological and histochemical aspects of the proximal cartilage of os penis and its surrounding perichondrium in 60 rats aged between 1 and 100 days are described. Comparisons at 11-14 days with the mandibular condylar cartilage reveal a slight difference in their general morphological composition. The developmental changes which take place in the os penis cartilage reveal histomorphologic events, some of which may be brought into agreement with previous observations of patterns of transformations of the bone. Observations on an age-dependent morphological appearance of the area adjacent to the proximal surface of the cartilage suggest certain agreements between the mandibular angular cartilage and the os penis cartilage. The study of phosphomonoesterases in the os penis cartilage and its perichondrium reveals significant, unexplained differences in the distribution of alkaline phosphatase between this cartilage and the mandibular condylar cartilage. 相似文献