胚胎发育

Most of these genes have not been reported to relate to the haematogenesis in ontogeny.

这些基因大多数在胚胎分化造血中的作用尚未见报道。

Open lesion occur in early stage and are called spina bifida aperta or myelomeningocele.

开放性脊生在胚胎的早期，又叫脊髓脊膜膨出。

Objective To discuss the clinical and pathological features of dysembryoplastic neuroepithelial tumor (DNT).

目的探讨胚胎不良性神经皮肿瘤(DNT)的临床及病理特点。

Objective To discuss the diagnosis and treatment of dysembryoplastic neuroepithelial tumor (DNT).

目的探讨胚胎不良性神经皮瘤(DNT)的诊断和治疗。

The development characters of small-nutted longan embryo were studied by paraffin method.

摘要采用石蜡切片法研究小核龙眼胚胎的特点。

Using anatomical method, the gonadal development in postembryonic period of Rana chensinensis, which had been migrated from Northeast China, is studied.

摘要采用解剖学方法，对南移后的中国林蛙胚胎后期性腺了观察。

The dorsoventral polarity of Drosophila egg is established by means of signaling between the germ line-derived oocyte and the surrounding somatic follicle cells.

果蝇胚胎的是由四种系统，分别控制头尾部、前部、后部以及背腹部的形成。

There are 5 stages during the development of embryo, including the stage of 2-celled proembryo, multicellular proembryo, globular proembryo, pyriform proembryo, differential embryo and mature embryo.

胚胎经过二细胞原胚、多细胞原胚、球形原胚、梨形原胚、分化胚和成熟胚阶段。

In case 6, the heart looks "inverted" compared to normal (Figure 8). This phenomenon is called dextrocardia, and it results from a looping anomaly during embryologic development.

病例6中的心脏与正常相比看去就像“反转”了一样（图8），这称作右位心，是由于胚胎过程中的心脏成环异常导致。