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Cuticle

Definition

noun

The outermost, noncellular, protective covering of certain organisms


Supplement

The cuticle refers to the various forms of the outermost covering of organisms. In humans, the cuticle is the outermost layer of the skin epidermis and is comprised of keratinocytes. In some animals, such as the invertebrates, the cuticle is the superficial layer that covers the epidermis. For example, the arthropods' cuticle is the outermost covering above the epidermis and that which forms the exoskeleton. In plants, the cuticle is the waxy covering on the surface of many of plant organs, e.g. leaves and young shoots. In plants, this waxy, hydrophobic covering protects the plant by minimizing water loss and curbing pathogen entry.


Also called:

  • cuticula

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Re: Mangrove Swamps

... get oxygen from air for the roots - Against high salinity, they have salt glands on their leaves to maintain water potential and they have a waxy cuticle to prevent water loss

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by janet121
Fri May 04, 2012 9:33 am
 
Forum: Ecology
Topic: Mangrove Swamps
Replies: 7
Views: 9470

fiber/hair moving thru water

Hair disorders result in the production of defective hair fibers. These disorders damage the outer cuticle layer and may expose the inner cortex to various hair treatments like curling, relaxing, pressing or coloring. The exposure to these strong hair treatments weakens ...

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by ebianco
Wed Apr 11, 2012 3:03 am
 
Forum: General Discussion
Topic: fiber/hair moving thru water
Replies: 17
Views: 12287

Human Hair DNA

... nuclear dna ? My understanding of hair structure is that it is a matrix with at least some dead cells present in various layers. Eg the outside cuticle is made of flattened cells . Feughelman, Max Mechanical properties and structure of alpha-keratin fibres: wool, human hair and related fibres, ...

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by pkc
Wed Apr 04, 2012 6:47 am
 
Forum: Human Biology
Topic: Human Hair DNA
Replies: 2
Views: 1506

Cuticle, spores, vascular, plant evolution

... In the first step it goes into how plants evolved from living in the freshwater to living on land with the use of: --------------------- the cuticle and cutinized spores: a method of prevention against desiccation and protection for the spores against drying out stomata: initially just pores ...

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by Klarien
Wed Feb 15, 2012 9:27 am
 
Forum: Botany Discussion
Topic: Cuticle, spores, vascular, plant evolution
Replies: 1
Views: 1980

Adaptations to life in water or plant?

In ferns, how are the cuticle and sporanga adapted to life on land? In mosses, how are capsule and protonema adapted to life on land? In gymnosperms, how are pollen cone, pollen grain, seed and seed cones adapted to life on land? In ...

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by Bobby123456
Fri Jul 23, 2010 3:52 am
 
Forum: Botany Discussion
Topic: Adaptations to life in water or plant?
Replies: 0
Views: 1716
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