Chapter 8
Tissues of the Human Body
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Tissus
Tissues are a group of cells that share a common embryonic origin. Microscopic observation reveals that the cells in a tissue share morphological features ...
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Tissus épithéliaux et leurs fonctions
Epithelial tissues are large sheets of cells covering all of the surfaces of the body. These surfaces can be internal or external, for example, skin, ...
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Molécules d’adhésion cellulaire - Types et fonctions
Cell adhesion molecules (CAMs) are pivotal to multicellularity and the coordinated functioning of tissues and organ systems. They enable physical ...
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Vue d’ensemble des jonctions cellule-cellule
The complex three-dimensional arrangement of cells in any multicellular organism is defined and maintained by interactions of cells with each other and ...
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Classification des tissus épithéliaux : aperçu
Epithelial tissues are classified according to the shape of the cells and the number of cell layers formed. Cell shapes can be squamous (flattened and ...
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Classification des tissus épithéliaux : épithélium simple
Simple epithelium consists of a single layer of cells that lines body cavities and blood vessels. The shape of the cells in the epithelium reflects the ...
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Classification des tissus épithéliaux : Épithélium stratifié
Stratified epithelium consists of several stacked layers of cells. They provide the durability to withstand constant physical and chemical attacks. ...
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Classification des tissus épithéliaux : Épithélium glandulaire
The glandular epithelium is made of one or more epithelial cells modified to synthesize and secrete chemical substances. Glandular epithelia can be ...
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Glandes exocrines : Glandes unicellulaires et multicellulaires
Exocrine glands are classified as unicellular and multicellular. The unicellular glands are scattered single cells, such as goblet cells, found in the ...
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Glandes exocrines : méthodes de sécrétion
Exocrine glands are those that release their secretions through ducts. Based on their mode of secretion, they can be classified into merocrine, apocrine, ...
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Glandes exocrines : types de sécrétions
Exocrine glands produce and release a variety of glandular products. Exocrine glands can be classified into serous, mucous, or mixed types based on their ...
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Introduction aux tissus conjonctifs
Connective tissues are one of the four main tissue types in humans that are extensively present in the body. They are characterized by cells embedded in ...
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Fonctions des tissus conjonctifs
Connective tissues perform a broad range of functions in the body. Their primary function is to connect and link different tissues in the body and act as ...
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Classification des tissus conjonctifs
The connective tissues have different properties and functions in the human body. They are broadly categorized into proper, supporting, or fluid ...
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Tissus conjonctifs embryonnaires
During early development, the embryo forms two types of connective tissues— the mesenchyme and mucoid connective tissue.
The mesenchyme is the first ...
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Vue d’ensemble des tissus conjonctifs proprement dits
Connective tissue proper is a class of connective tissue that encompasses all mature connective tissues except bone, cartilage, blood, and lymph. This ...
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Matrice extracellulaire
Unlike epithelial tissue, which is composed of cells closely packed with little or no extracellular space in between, connective tissue cells are ...
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Fibres du tissu conjonctif et substance fondamentale
One of the significant functions of connective tissue is connecting tissues and organs. Unlike epithelial tissue that is composed of cells closely packed ...
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Tissu conjonctif lâche
Loose connective tissue is found between many organs. Its main function is to absorb shock and bind tissues together. It also allows water, salts, and ...
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Tissu conjonctif dense
Dense connective tissue contains more collagen fibers than loose connective tissue. As a consequence, it displays greater resistance to stretching. There ...
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Couches de tissu conjonctif proprement dit
Fascia, a thin layer of fibrous connective tissue, is distributed throughout the body. It demarcates and forms a supportive covering over skeletal ...
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L’os comme tissu conjonctif de soutien
Bone tissue forms the internal skeleton of vertebrate animals, providing structure to the body.
Bone Matrix
Bone, or osseous tissue, is a connective ...
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Membranes tissulaires
A tissue membrane is a thin layer of cells that covers the outside of the body, the organs, internal passageways that lead to the exterior of the body, ...
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Tissus conjonctifs fluides : sang et lymphe
Blood and lymph are fluid connective tissues. They contain cells, also known as formed elements, circulating in a liquid extracellular matrix, the plasma. ...
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Lésions tissulaires : inflammation et réparation
Following injury, the integrity of the injured tissues must be reestablished. For example, in skin tissue, wound repair involves coordination among ...
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L’effet du vieillissement sur les tissus
Several body functions deteriorate with age. The external signs of aging are easily identifiable. For example, the skin becomes dry, less elastic, and ...
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