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关键词： 医学形态学   组织胚胎学   翻转课堂   以学生为中心  

摘要： 翻转课堂是体现"以学生为中心"的有效教学模式,可培养学生自主学习、主动学习等方面的能力,以求达到"自己会学、知识应用、创造知识和终身学习"。医学形态学是医学基础课程,是以图像结构为主体的知识体系,在实验教学上通过课堂翻转可提高知识的掌握程度和表达能力,不仅做到对知识的"知道",而且达到"会说"。

关键词： TBL   教学   组织学与胚胎学  

摘要： 目的以学生自学、讨论、教师引导三结合,通过团队协作学习而实现教学目的。方法 2013级临床学生为研究对象,比较实验组和对照组组织胚胎学及相关学科考核的平均成绩、优秀率及良好率,并对实验组进行了问卷调查。结果实验组组织胚胎学平均成绩、优秀率、良好率显著高于对照组(P<0.05),未采用TBL教学模式的相关学科中实验组与对照组的平均成绩、优秀率、良好率差异无统计学意义(P>0.05)。结论 TBL教学是一种以团队为基础的新型教学模式。学生之间互帮互助、互相督促,实现了自主学习、讨论式学习和互学互教的拓展性学习,体现了课堂授课学生与教师比例高的优点,节省教师资源,又注重学生应用知识能力的培养,有效发挥了学生的"主体性"及教师的"主导性"的双重教学效应。

关键词： 组织学与胚胎学   教学研究论文   文献分析  

摘要： 对2010-2018年组织学与胚胎学教学研究论文进行抽样,从研究方法、研究内容和研究质量三个方面进行文献分析,发现经验总结法仍然是当然主流的研究方法,其他定量研究方法的应用也在逐步增加。当前研究内容的热点集中在教学资源建设与现代教育技术应用领域,总体上教学研究质量仍然不高,今后应进一步把握研究方向,提高研究的科学性和创新性。

关键词： 石蜡切片   卵裂期   胚带形成期   胚动   器官形成期  

摘要： 胚胎发育是动物许多重要器官与性状发育的重要时期。本文利用石蜡切片法,对家蚕的胚胎发育进行了观察,并在显微镜可见光明场下拍照记录胚胎发育的形态特殊时期及其经历的发育时间,直观地获得家蚕胚胎发育完整过程。实验完整记录了家蚕胚胎发育的5个胚胎发育时期及其相对应:卵裂与胚盘形成期、胚带形成期、器官形成期和完成期及其相对应的发育时间。为进一步研究家蚕个体发育,器官的形成与分化奠定基础。

关键词： Air desiccation   Hormone-free medium   Internode and stipe explants   Microscopic analysis   Somatic embryogenesis   Sucrose treatment  

摘要： Cyathea delgadii is the first fern species for which somatic embryogenesis (SE) has recently been described. With this discovery, a new experimental model for exploration of SE was found. In this study, the effect of explant type (stipe and internode), length and diameter of the explant-donor frond, and stress treatment (by sucrose and air desiccation) on somatic embryo origin and SE efficiency was studied. In control culture, somatic embryos originated from single cells of stipe explants, whereas those induced on internodes were of multicellular origin. Although the activation of cell divisions was more abundant and the formation of somatic embryos occurred earlier in a culture of internodes than of stipe explants, the morphogenic capacity of internodes was much smaller. On their surface, the groups of competent cells formed protuberances that give rise to only three somatic embryos per internode. In contrast, almost 92% of stipe explants that were excised from the first frond, measuring 10mm in length and less than 300 mu m in diameter, produced an average of 21 somatic embryos. Stipes treated with sucrose were not able to SE. More than fourfold increase in SE efficiency was obtained on internodes by their treatment with 0.4M sucrose for 45min. It was achieved by changing the pathway of somatic embryo differentiation from multicellular to unicellular. These results provide an excellent basis for further research on the mechanism of SE induction associated with a single- and multi-cell proliferation, especially that both types of the embryogenic pathway can occur on the same hormone-free medium.

关键词： 任务式教学法   组织胚胎学   实验教学  

摘要： 目的:探讨组织胚胎学实验教学中任务式教学法的效果。方法:选取仙桃职业学院两个组织胚胎学班,分别实施传统教学与任务式教学法,在学期末对两班学生实验成绩进行考核和满意度调查。结果:任务班实验成绩考核结果、满意度调查结均高于传统班(P<0.05)。结论:任务式教学法可有效提升组织胚胎学实验教学成绩和教学满意度。

关键词： 说课   泌尿系统   教学实施   解剖  

摘要： 本文教法上采用任务驱动法、学法上运用小组合作学习法、自主探究式学习法完成了第五章泌尿系统的教学,摆脱了传统课堂灌输式的教学,学生积极参与,课堂氛围好,很好的完成了教学任务。

关键词： 组织学与胚胎学   视频   案例教学   教育信息化   教学模式   互联网   创新   改革  

摘要： 组织学与胚胎学在医学基础课程中占有重要地位,核心内容是研究与人体生理机能相关的组织细胞形态结构及形态的发生发育。该课程以理论教学和实验教学为主要内容。近年来,随着现代教育理念的不断更新和互联网+及大数据技术的发展,组织学与胚胎学教学形式呈现多样化、科学化趋势。教学中,为了展示复杂抽象的显微镜下立体结构及毗邻关系,以及胚胎形态的形成,大量高清图片及视频展示是不可或缺的。针对组织学与胚胎学理论知识枯燥、繁琐,学生学习主动性和积极差,并适应现代教育理念的更新,提出在组织学与胚胎学教学中运用"视频案例教学模式",研究比较该教学模式和传统教学模式的教学效果,最后反馈总结教学体会。

关键词： Equine embryo   Endometrium ultrastructure   Histotroph   Pre-implantation period   Ciliated cells   Blood vessel  

摘要： The aim of this study was to evaluate ultrastructural and histological changes in the endometrium on days 7, 10 and 13 post-ovulation in pregnant and cyclic mares. Mares were routinely examined by transrectal palpation and ultrasonographic examination of the reproductive tract until estrus was detected. In the first cycle, endometrial biopsies from 30 cyclic mares (Cyclic group) were collected on days 7, 10 and 13 post-ovulation. in the second cycle, the same mares were bred by a fertile stallion. At days 7, 10 and 13 post-ovulation intrauterine biopsies were collected. Immediately after sample collection, the mare's uteri were flushed, and those mares with embryo recovery were assigned to the Pregnant group. From ovulation detection until day of uterine biopsy, blood samples to measure Progesterone concentrations were collected daily in cyclic and pregnant mares. A larger blood vessel caliber was observed in pregnant mares than in cyclic from day 7-13. On the 7th day of pregnancy a large loss of ciliated cells was evident in the group of pregnant mares in comparison with the Cyclic group and the superficial cells of the endometrium were more protruded, and a small amount of histotrophic material between the folds was observed. On the 10th day of pregnancy, the glandular histotrophic secretion and the secretion of lumina! epithelium became more intense than the secretion of cyclic mares. On the 13th day of pregnancy, a very large amount of histotroph was observed within large glandular openings surrounded by ciliated cells. The concentrations of P4 were affected by day (P < 0.001), but were not affected by group. Changes occurred in the uterine environment thereupon the entry of the embryo into the uterus. In the stroma and in the lumen, these modifications may aid to provide the necessary nutrition for the initial development of the embryo and to promote changes at cellular structures that will interact in the embryonic signaling and future fixation, implantation a