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University of California, Berkeley
Industry: Education
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Support structure in animals, against which the force of muscles acts. Vertebrates have a skeleton of bone or cartilage; arthropods have one made of chitin; while many other invertebrates use a hydrostatic skeleton, which is merely an incompressible fluid-filled region of their body.
Industry:Biology
打开或 urochordates,将水抽入体腔中软体动物。在许多软体动物,虹吸管可用于是强行驱逐水提供的推进力的一种手段。
Industry:Biology
划分成较小的、 更大的区域如中央一些珊瑚虫的体腔内的分区。
Industry:Biology
在许多动物,身体分为反复亚基称为段,如那些在蜈蚣、 昆虫和环节。分割是拥有或正在开发以这种方式的机构计划的状态。
Industry:Biology
In trilobites, the posterior division of the body, formed by fusion of the telson with one or more posterior pleurae.
Industry:Biology
在三叶虫和其他节肢动物,胸是瘦长的平面生技从每个主体段,又会慢慢淡和保护了它的附属品。
Industry:Biology
任何进入或通过一个组织或身体结构的开幕。
Industry:Biology
In mammals, a tissue formed within the uterus through which nutrients are passed from the mother to the embryo (and later the fetus) and its wastes are removed. It is analogous to the protective membranes in the egg of other amniotes. placental n. A mammal that gives live birth to well-developed young that have prolonged embryonic development within the mother’s uterus. Marsupial mammals also have a placenta, but the embryo spends less time developing in the uterus before birth. Placentals include animals as diverse as humans, elephants, dogs, and mice.
Industry:Biology
动物分类的类与王国 ; 之间的层次结构中的一个类别门-pl。
Industry:Biology
在刚刚过去的嘴本身消化道腔。可能被 muscularized 为吮吸或在各种动物中吞下。
Industry:Biology
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