When we harm ourselves and bleed, or, to put it another way, whenever our capillaries are injured, our bodies have their own way of fighting, which is blood clotting or coagulation. A tissue is an agglomeration or cluster of cells that work together to accomplish a certain purpose. Since tissue is a group of cells, therefore the obvious fact is that organism is multicellular. Tissues are made up of different types of cells that enable the group of tissue to perform a particular function.
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There are some very distinct points of difference between blood clots and tissues that should be noted. Acknowledging these differences is essential for knowing the proper meanings of the two terms.
References
- https://www.annualreviews.org/doi/abs/10.1146/annurev-fluid-010814-014513
- https://www.researchgate.net/profile/Valery-Tuchin/publication/248103870_Tissue_Optics_Light_Scattering_Methods_and_Instruments_for_Medial_Diagnosis/links/5425c74b0cf2e4ce9406f647/Tissue-Optics-Light-Scattering-Methods-and-Instruments-for-Medial-Diagnosis.pdf