在人的生殖过程中，受精和胚胎发育的场所分别是输卵管和子宫．______．-生物

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• 胎儿在母体内生活，氧气是（）A．通过胎儿的呼吸系统获得的B．直接从母体的血液中获得的C．通过胎盘从母体中获得的D．通过胎儿的消化系统获得的-生物
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• 家兔的胚胎在母体子宫内发育时，不可能从母体内获得（）A．无机盐和维生素B．血细胞和消化液C．葡萄糖和氨基酸D．水和氧气-生物
• 下列属于生殖细胞的是①精子②卵细胞③受精卵④卵巢⑤睾丸[]A．①②B．③④C．②⑤D．②④-七年级生物
• 人类新个体的产生要经历由___________结合，通过_________发育形成新个体的过程。-七年级生物
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• 下图是子宫内的胎儿、胎盘和母体的关系图，请据图回答下列问题。(1)胎儿在母体的[]__________中发育，生活在其内半透明的液体__________中，胎儿所获得的营养经过[]________-七
• 人的胚胎形成就可称为胎儿。[]-八年级生物
• “十月怀胎，一朝分娩”，感谢母亲给了我们生命。在280天的辛苦孕育过程中，母亲时刻通过下列哪一器官或结构为胚胎发育提供养料和氧气[]A．子宫B．输卵管C．胎盘D．卵巢-八年级生物
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