A tissue, in biology, is defined as a group of cells that possess a similar structure and perform a specific function. The word tissue originates from French, which means “to weave.”
In animals, there are 4 types of tissues, namely:
- Muscle tissue (cardiac, skeletal and smooth muscle tissues)
- Connective tissue (cartilage, blood, bone)
- Nervous tissue (neurons and neuroglia)
- Epithelial tissue (simple epithelium, simple cuboidal, simple columnar epithelium, etc)
Plants have their own set of tissues, namely:
- Dermal Tissues (epidermal cells, stomata, trichomes)
- Ground tissues (Collenchyma, parenchyma, sclerenchyma)
- Vascular tissue (Vessel elements, tracheids, companion cells and sieve tubes)
Concept of Tissues
The concept of tissues can be traced back to 1801 when it was introduced by Xavier Bichat, a French anatomist and pathologist. He had proposed that tissues are a central element in human anatomy, concluding that organs are essentially a collection of distinct tissues.
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