Question

What are plasmodesmata and desmosomes?

Answer 1

Intercellular junctions:

1. In animal cells, intercellular junctions are tiny gaps between cells that connect neighboring cells and hold tissue fluid.
2. The most important structures are Interdigitations, Intercellular Bridges, Tight Junctions, Gap Junctions, Desmosomes, Terminal Bars, and Plasmodesmata.
3. Desmosomes are circular patches with disc-shaped thickening on the inner side of adjacent membranes, a number of tonofibrils, and trans-membrane linkers embedded in dense intercellular material. They show up in epithelia that have been damaged. Macula Adherens are found in heart muscle, epithelia, and other tissues and are also known as Macula Adherens.
4. Plasmodesmata are a form of membrane that permits materials to move from one cell to the next.
5. Symplast is a protoplasmic continuum that they make. A canal and a desmotubule, which is a simple or branched tubule, make up a plasmodesmata.
6. Desmotubule is an endoplasmic reticulum protrusion.
7. Plasmodesmata fall into two main categories: Primary — These are responsible for growth and development and are created during cell division. Secondary - They develop between mature cells and have distinct functional features.