To the notion of tissue two great meanings are attributed to him: one related to fashion and the textile industry, and another associated to the biology .
A tissue can therefore be a product that someone made by weaving (that is, interlacing threads, cords, etc., to form fabrics). For example: “This fabric has sheep wool and organic cotton”, “I want to buy a knitted sweater so I won't be so cold next winter”.
This kind of fabrics can be flat (twill, satin or taffeta) or knitted (both warp and weft). Some of the most common fabrics internationally are silk, linen, wool and cotton.
Fabric is also used to refer to the texture that has a certain fabric : “I don't like the fabric of this cloth, although the color is very attractive ”, “I want a fabric that is soft to the touch”.
For biology, anatomy, zoology and botany, a tissue is formed from the different aggregates of cells in the same class but differentiated in a certain way and ordered on a regular basis. The cells of a tissue work together, in block, to fulfill a specific role.
Animals have four fundamental tissues: muscle tissue , he nervous tissue , he epithelial tissue and the connective tissue . In the case of muscle tissue, it must be said that it is composed of muscle fibers and that it represents between 40 and 45 percent of the mass of the man. People and animals move thanks to this tissue, whose cells are highly specialized.
Stem cells and tissue reconstruction
A large part of our body's tissues have a certain number of stem cells, whose function is the regeneration in case of damage. Despite this, when conditions of a considerable volume occur, their performance is not enough. And that is the point at which a technique that has been in research and development for some time now could mark one before and one after in the medicine world. It is about providing the committed tissues with more stem cells than they naturally have, and the goal is to achieve the reconstruction of whole organs, with the consequent reduction in the percentage of transplants performed every year.
The main goals are the heart, lungs and liver, and it is promised to get a complete regeneration, both the fabric and the functionality. To support such promises, there is evidence of interventions who have managed to reconstruct parts of the esophagus, the trachea and the musculature attached to the skeleton of people and animals.
Basically this process it is based on the fact that stem cells do not have a particular function and even when they are removed from a tissue, they do not lose the ability to divide to transform into new cells, retaining its properties.
Unlike cloning, this practice does not raise the same questions ethical, although it does feed that human being need not to die until it is absolutely necessary, to cure those diseases for which other living beings die and respect the cycle of which they are part. Certainly the reconstruction of tissues with external stem cells is less violent than a transplant, and if it is taken into account that this last type of intervention takes place more than one hundred thousand times a year globally (not counting people who fail to get the organ they need) this discovery cannot be considered negative, since it would offer all those patients the same possibilities.