单选题
关于胎儿循环系统解剖学特点，哪项阐述正确？（ ）
发布日期：2021-03-18
卵圆孔位于左、右心房之间
脐静脉2条
动脉导管位于肺静脉与主动脉弓之间
脐动脉1条
动脉导管与动脉韧带并行
试题解析
循环系统
循环系统是分布于全身各部的连续封闭管道系统，它包括心血管系统和淋巴系统。心血管系统内循环流动的是血液。淋巴系统内流动的是淋巴液。淋巴液沿着一系列的淋巴管道向心流动，最终汇入静脉，因此淋巴系统也可认为是静脉系统的辅助部分。
- 中文名
- 循环系统
- 组成
- 生物体的
- 外文名
- circulatory system;cardiovascular system
解剖学
解剖学是涉及生命体的结构和组织的生物学分支学科，可以分为动物解剖学和植物解剖学。解剖学的主要分支有比较解剖学、组织学和人体解剖学。在解剖学研究中，研究大体器官常利用剖割的方法，组织、细胞、胞器的观察则会利用显微镜。
- 中文名
- 解剖学
- 分类
- 动物解剖学和植物解剖学
- 研究方向
- 人体解剖学和生理学
- 学科
- 生物学分支学科
- 相关人物
- 医学家盖伦
- 最小单位
- 细胞
胎儿
胎儿，是指妊娠8周以后的胎体。妊娠4～8周娩出的胎体为胚胎。胚胎期重要器官逐渐形成，在胎儿期各器官进一步发育成熟。胎儿在妊娠28周以前娩出的现象称为流产；孕28～37周前娩出的现象称为早产，孕37周至不满42足周娩出的现象称为足月产。妊娠全程共280天即40周。
- 中医病名
- 胎儿
- 就诊科室
- 妇产科
- 传染性
- 无
- 外文名
- fetus
- 常见病因
- 妊娠8周以后的胎体
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