Difference Between Exoskeleton and Endoskeleton

Thekey differencebetween exoskeleton and endoskeleton is that外骨骼是一种外部骨骼，存在于动物体外，而内骨骨骼则是动物体内​​存在的内部骨架。

Body of a living organism, be it a honey bee or a human being, is a complex network of different organs. These organs perform several functions of their own besides being connected to each other for a harmonious, balanced and functional body. All are complex marvels of nature as every species has a special feature of its own. Some have only an endoskeleton while some have only an exoskeleton while some have both for support. As the name suggests, exoskeleton locates outside the body while endoskeleton locates inside the body. The external skeleton protects and also supports the animal’s body. On the other hand, endoskeleton gives support and protection to both the inner softer and fragile organs like heart, lungs, and kidneys, etc.

内容

1.Overview and Key Difference
2.什么是外骨骼
3.What is Endoskeleton
4.Similarities Between Exoskeleton and Endoskeleton
5.并排比较 - 表格形式的外骨骼与内骨骨骼
6。概括

什么是外骨骼?

Exoskeleton is an external shell-like structure that is present outside the body of an animal. It is mainly a non-living structure derived from theectoderm。大约5.5亿年前，矿化外骨骼的化石记录揭露了。它具有非常抗性，僵硬，有些脆弱和坚硬的结构，具有多个特定的角色。

外骨骼主要有助于排泄动物体内产生的废物或Anthropoda。Furthermore, it supports the movement and safety of inner softer organs. Not only that, but exoskeleton also involves sensing and feeding. It contains calcium carbonate and/or chitin. In simple language, it is called a shell. Organisms like snails, crabs, lobsters, shellfish cockroaches, crustaceans and insects like grasshoppers have an exoskeleton and some animals like tortoise have both endoskeleton and exoskeleton.

What is Endoskeleton?

内骨骨骼是矿化组织，可为动物的内部结构提供支持。它在更深的身体组织和器官中发展。在胚胎发育过程中，内胚层是从中胚层组织发育的，并通过脊索和软骨形成。后来，在宫内寿命或胎儿寿命中，这经历了内膜内骨化和外膜外骨化的阶段，最终导致了骨骼，软骨和二次软骨网络。最终，所有这些结合在一起形成一个内骨骼。

在发育和复杂性方面，内骨骼的形式和类型不同。因此，Chordata, Coleoidea,Porifera, andEchinodermata彼此不同。与外骨骼相似，内骨骨骼也具有特定的角色，例如支持，保护等。此外，内骨骨骼支持运动和身体部位运动的运动，同时充当肌肉的固定位点。

What are the Similarities Between Exoskeleton and Endoskeleton?

• 外骨骼和内骨骨骼是为生物体提供结构支持的硬结构。
• 同时,像suppor都有类似的功能t, movement and protection.
• 最重要的是，两个骨架都保护动物的内部器官。

外骨骼和内骨骨骼有什么区别？

In short ‘endo’ means part of the body that is inside and ‘exo’ means part of the body that is outside in this particular matter. Hence, this is the main difference between exoskeleton and endoskeleton. Endoskeleton is what we humans have while exoskeleton is what insects and other arthropods have. Furthermore, the exoskeleton helps in excretion, but endoskeleton does not.

同样，外骨骼和内骨骨骼之间的另一个区别是，内骨骨骼在长骨的轴上具有骨髓，这有助于通过对人体的内皮增生过程制作血细胞，而这种特征则在外骨骼中不存在。此外，外骨骼主要包含身体的非生命部分，例如在鱼，大多数动物的头发上鳞片，鸟类，鸟类的羽毛，但肌肉附着在羽毛的内部，困难的部分是内骨骨架，是身体的生物部分对大脑的刺激有反应。因此，这也是外骨骼和内骨骼之间的重要区别。同样，就发育而言，内胚层从中胚层或内胚层和外胚层外骨骼发展。

概括– Exoskeleton vs Endoskeleton

Exoskeleton and endoskeleton differ mainly from each other by the location of the body where it situates. Exoskeleton is present external to the body while endoskeleton is present inside the body. Thus, this is the key difference between exoskeleton and endoskeleton. Furthermore, they differ from the germ layer from which they derive. Exoskeleton is derived from the ectoderm while endoskeleton is derived from the endoderm or mesoderm. And also, exoskeleton is a rigid structure which is nonliving while endoskeleton is a flexible structure which is living.

Reference:

1.Libretexts. “38.1: Types of Skeletal Systems.” Biology LibreTexts, Libretexts, 12 June 2018.Available here

Image Courtesy:

1.”Fiddler crab exoskeleton shedding within the marsh (6555236543)”By Pacific Southwest Region USFWS from Sacramento, US (Public Domain) viaCommons Wikimedia
2.”2504344″ byanaterate（CC0）通过pixabay