海星30个单词的英文简介
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发布时间：2022-04-21 10:07
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时间：2023-09-09 19:57
海星（Asteroidea）：是棘皮动物中结构生理最有代表性的一类。
Starfish: it is the most representative class of structural physiology in echinoderms.
体扁平，多为五辐射对称，体盘和腕分界不明显。生活时口面向下，反口面向上。腕腹侧具步带沟，沟内伸出管足。
The body is flat, mostly five radially symmetrical, and the boundary between body disk and wrist is not obvious. When you live, your mouth faces down and your mouth faces up. The ventral wrist has a step band groove, and the canal foot extends out of the groove.
内骨骼的骨板以结缔组织相连，柔韧可曲。体表具棘和叉棘，为骨骼的突起。
The bone plates of the endoskeleton are connected by connective tissue and are flexible and flexible. There are spines and forked spines on the body surface, which are protuberances of bones.
从骨板间突出的膜质泡状突起，外覆上皮，内衬体腔上皮，其内腔连于次生体腔，称为皮鳃，
The membranous vesicular protrusion protruding from between bone plates is covered with epithelium and lined with coelomic epithelium, and its inner cavity is connected to the secondary coelom, which is called skin gill,
有呼吸和使代谢产物扩散到外界的作用。水管系发达。个体发育中经羽腕幼虫和短腕幼虫。
It has the function of breathing and diffusing metabolites to the outside world. The water pipeline system is developed. In ontogeny, there are two kinds of larvae, namely, feather wrist larvae and short wrist larvae.
辐径1-65厘米，多数20-30厘米。腕中空，有短棘和叉棘覆盖。下面的沟内有成行的管足，
Radial diameter 1-65 cm, most 20-30 cm. The wrist is hollow and covered with short spines and fork spines. There are rows of tube feet in the lower groove,
使海星能向任何方向爬行，甚至爬上陡峭的面。低等海星取食沿腕沟进入口的食物粒。
So that starfish can crawl in any direction, even up steep surfaces. Lower starfish feed on food particles that enter the mouth along the wrist groove.
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时间：2023-09-09 19:57
