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The Basic Types Of Tissue Video

In biologytissue is a cellular organizational level between cells and a Tizsue organ. A tissue is an ensemble of similar cells and their extracellular matrix from the same origin that together carry out a specific function. Organs are then formed by the functional grouping together of multiple tissues. The English word "tissue" derives from the French word "tissue", meaning that something that is "woven", from the verb tisse, "to weave".

The four types of fabrics

The study of human and animal tissues is known as histology or, in connection with disease, as histopathology. For plants, the discipline is called plant anatomy.

The classical tools for studying tissues are the paraffin block in which tissue is embedded and then sectioned, the histological stainand the optical microscope. Developments in electron microscopyimmunofluorescenceand the use of frozen tissue-sections have enhanced the detail that can be observed in tissues.

With these tools, the classical appearances of tissues can be examined in health and diseaseenabling considerable refinement of medical diagnosis and prognosis. Animal tissues are grouped into four basic types: connectivemusclenervousand epithelial. While all animals can generally be considered to contain the four tissue types, the manifestation of these tissues can differ depending on the type of organism.

For example, the origin of the cells Tjssue a particular tissue type may differ developmentally for different classifications of animals. The epithelium in all animals is derived from the ectoderm and endodermwith a small contribution from the mesodermforming the endotheliuma specialized type of epithelium that composes the vasculature.

Introduction

By contrast, a true epithelial tissue is present https://amazonia.fiocruz.br/scdp/essay/mormon-bank-utah/i-felt-like-making-a-deep-breath.php in a single layer of cells held together via occluding junctions called tight junctionsto source a selectively permeable barrier. This tissue covers all organismal The Basic Types Of Tissue that come in contact with the external environment such as the skinthe airways, and the digestive tract.

It serves functions of Typfs, secretionand absorption, and is separated from other tissues below by a basal lamina. The epithelial tissues are formed by cells that cover the organ surfaces, such as the surface of skinthe airwayssurfaces of soft organs, the reproductive tractand the inner lining of the digestive tract. The cells comprising an epithelial layer are linked via semi-permeable, tight junctions ; hence, this tissue provides a barrier between the external environment and the organ it covers. In addition to this protective function, epithelial tissue may Off be specialized to function in secretionexcretion and absorption. Epithelial tissue helps to protect organs from microorganisms, injury, and fluid loss. There are many kinds of epithelium, and nomenclature is somewhat variable.

Most classification schemes combine a description of the cell-shape in the upper layer of the epithelium with a word denoting the number of layers: either simple one layer of cells https://amazonia.fiocruz.br/scdp/essay/essay-writing-format-cbse-class-12/religious-tradition-and-religious-traditions.php stratified multiple layers of cells. However, other cellular The Basic Types Of Tissue such as cilia may also be described in the classification system. Some common kinds of epithelium are listed below:. Connective tissues are fibrous tissues made up of cells separated by non-living material, which is called an extracellular matrix.

This matrix can be liquid or rigid. For example, blood contains plasma as its matrix and bone's matrix is rigid. Connective tissue gives shape to organs and holds them in place. Blood, bone, tendon, ligament, adipose, and areolar tissues are examples of connective tissues. One method of classifying connective tissues is to divide them into three types: fibrous connective tissue, skeletal connective tissue, and fluid connective tissue. Muscle cells form the active contractile tissue of the body known as muscle tissue or muscular tissue. Muscle tissue functions to produce force and cause motioneither locomotion or movement within internal organs. Muscle tissue is separated into three distinct categories: visceral or smooth musclefound in the inner linings of organs ; skeletal muscletypically attached to bones, which generate gross movement; and cardiac musclefound in the heartwhere it contracts to pump blood throughout an organism.

Cells comprising the central nervous system and peripheral nervous system are classified The Basic Types Of Tissue nervous or neural tissue. In the central nervous system, neural tissues form the brain and spinal cord.

Tissue membranes

In the peripheral nervous system, neural tissues form the cranial nerves and spinal nervesinclusive of the motor neurons. In plant anatomytissues are categorized broadly into three tissue systems: the epidermisthe ground tissueand the vascular tissue. Meristematic tissue consists of actively dividing cells and leads to increase in length and thickness of the plant. The primary growth of a plant occurs only in certain, specific regions, such as in the tips of stems or roots.]