Écdise: Diferenzas entre revisións

Contido eliminado Contido engadido
Miguelferig (conversa | contribucións)
Sen resumo de edición
Miguelferig (conversa | contribucións)
Liña 10:
== Proceso ==
<!--
Para prepararse para a écdise, os artrópodos quedan inactivos durante un período de tempo, sofren [[apólise]] ou separación do velloo exoesqueleto das células epidérmicas subxacentes. Para a maioría dos organismos, o período de repouso é un estado de preparación durante o cal ten lugar a [[secreción]] de fluídos das glándulas da muda das capas epidérmicas e o afrouxamento das partes internas da cutícula.
In preparation for ecdysis, the arthropod becomes inactive for a period of time, undergoing [[apolysis]] or separation of the old exoskeleton from the underlying epidermal cells. For most organisms, the resting period is a stage of preparation during which the secretion of fluid from the moulting glands of the epidermal layer and the loosening of the underpart of the cuticle occur.
Unha vez que a vella cutícula se separou da epiderme, segrégase un fluído dixestor no espazo que hai entre elas. Porén, este fluído permanece inactivo ata que se formaron as partes superiores da nova cutícula. Entón, por medio de movementos de arrastre, o organismo empuxa cara a fóra a vella cuberta tegumentaria, que se se abre por detrás permitindo que o animal emerxa. Con frecuencia, esta rotura inicial é causada por unha combinación de movementos e un incemento da presión sanguínea (da linfa) dentro do corpo, forzando unha expansión no seu [[exoesqueleto]], o que produce unha maior rotura que permite que certos organismos, como as [[araña]]s se liberen e saian da cuberta vella.
Once the old cuticle has separated from the epidermis, a digesting fluid is secreted into the space between them. However, this fluid remains inactive until the upper part of the new cuticle has been formed. Then, by crawling movements, the organism pushes forward in the old [[Integumentary system|integumentary shell]], which splits down the back allowing the animal to emerge. Often, this initial crack is caused by a combination of movement and increase in blood pressure within the body, forcing an expansion across its [[exoskeleton]], leading to an eventual crack that allows for certain organisms such as [[spider]]s to extricate themselves.
Aínda que a vella cutícula está sendo dixerida, segrégase a nova capa. Todas as estruturas cuticulares despréndense na écdise, incluíndo as partes internas do exoesqueleto, o cal inclúe os recubrimentos terminais do [[tracto alimentario]] e das [[traquea (artópodos)|traqueas]] se estes están presentes.
While the old cuticle is being digested, the new layer is secreted. All cuticular structures are shed at ecdysis, including the inner parts of the exoskeleton, which includes terminal linings of the [[alimentary tract]] and of the [[invertebrate trachea|trachea]]e if they are present.
{{Multiple image
| header = Physiology of ecdysis
Liña 28:
== Insectos ==
{{wide image|Aeshna cyanea freshly slipped L2.jpg|1200px|Moulting (ecdysis) in [[southern hawker]], ''Aeshna cyanea''}}
<!--
 
Each stage of development between moults for insects in the taxon [[endopterygota]] is called an [[instar]], or stadium, and each stage between moults of insects in the [[Exopterygota]] is called a nymph: there may be up to 15 nymphal stages. [[Endopterygota]] tend to have only four or five instars. Endopterygotes have more alternatives to moulting, such as expansion of the cuticle and collapse of air sacs to allow growth of internal organs.
 
Liña 57:
Os [[euriptéridos]] son un grupo de [[quelicerados]] que se [[extinción|extinguiu]] a finais do [[Permiano]]. Sufrían écdise de maneira similar aos quelicerados hoxe existentes, e a maioría dos seus fósiles crese que son de exuvias, en vez de de corpos completos.<ref name="Tetlie"/>
-->
 
== Notas ==
{{listaref|32em}}