What are imaginal tissues?
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An imaginal disc is a sac-like epithelial structure found inside the larva of insects that undergo metamorphosis. Once the larva turns into a pupa, almost all the larval tissues degenerate and the imaginal discs turn into the external structures of the head, thorax, limbs and genitalia.
What is the function of imaginal discs?
Discs serve as a canvas to experimentally address how cells and tissues respond to gain or loss of specific gene functions. The potential of using imaginal discs to aid future discoveries remains unchallenged, thus promising further contributions in cell and developmental biology.
What is a wing disc?
The wing disc is a relatively flat epithelial sac that grows during larval stages of development. As it grows, the rapidly proliferating cells on one side (the wing pouch) become pseudostratified, whereas cells on the other side become squamous.
Are imaginal cells stem cells?
Transdetermination: Drosophila imaginal disc cells exhibit stem cell-like potency. Int J Biochem Cell Biol. 2007;39(6):1105-18. doi: 10.1016/j.
What does the word imaginal mean?
Definition of imaginal (Entry 1 of 2) : of or relating to imagination, images, or imagery.
Where do imaginal cells come from?
Abstract. Imaginal disks are epithelial structures characteristic of insects that undergo complete metamorphosis. These epithelia originate during embryonic development from groups of ectodermal cells that grow during the larval stages to form the mature disk.
Why is it called imaginal discs?
Why are they called imaginal discs? That’s easy… ‘imago’ is a Latin word that means ‘image’ and is used by entomologists to refer to the mature stage of insects. The imaginal discs get their name since they are ‘disc’-shaped structures that will originate the imago.
What is Epimorphic regeneration?
Epimorphic regeneration is a process allowing some vertebrates to regrow complete functional appendages after previous amputation. Adult mammals are not able to regenerate their limbs after injury.
What is imaginal psychology?
a type of exposure therapy used for treating individuals with anxiety disorders (e.g., phobias, obsessive-compulsive disorder, posttraumatic stress disorder). Vivid imagery evoked through speech is used by the therapist to expose the client mentally to an anxiety-evoking stimulus.
What is the imaginal realm?
The imaginal realm is a meeting ground, a place of active exchange between two bandwidths of reality. That is how its cosmic purpose is fulfilled and—I will attempt to demonstrate shortly—the way in which it can be most fruitfully understood.
How do imaginal cells work?
The imaginal cells form clusters and clumps, begin resonating at the same frequency and passing information back and forth until they hit a tipping point. They begin acting not as discrete individual cells but as a multi-cell organism – and a butterfly is born.
What is the difference between morphallaxis and epimorphosis?
Morphallaxis is true regeneration where organisms from its cut part can make a new Organism. Morphallaxis is observed in Planaria and Hydra. Epimorphosis is false regeneration where organisns restore or repair it’s lost part.