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Collagen

procollagencollagenscollagen fibers
All connective tissue consists of three main components: fibers (elastic and collagenous fibers), ground substance and cells. Dense regular connective tissue, found in structures such as tendons and ligaments, is characterized by collagen fibers arranged in an orderly parallel fashion, giving it tensile strength in one direction.
Collagen is the main structural protein in the extracellular space in the various connective tissues in the body.

Tissue (biology)

tissuetissuesbiological tissue
Connective tissue (CT) is one of the four basic types of animal tissue, along with epithelial tissue, muscle tissue, and nervous tissue.
Animal tissues are grouped into four basic types: connective, muscle, nervous, and epithelial.

Elastic fiber

elastic tissueelastic fiberselastic
All connective tissue consists of three main components: fibers (elastic and collagenous fibers), ground substance and cells. Elastic fibers, made from elastin and fibrillin, also provide resistance to stretch forces.
Elastic fibers (or yellow fibers) are bundles of proteins (elastin) found in extracellular matrix of connective tissue and produced by fibroblasts and smooth muscle cells in arteries.

Loose connective tissue

areolarareolar connective tissueareolar tissue
Connective tissue can be broadly subdivided into connective tissue proper, and special connective tissue. Connective tissue proper consists of loose connective tissue and dense connective tissue (which is further subdivided into dense regular and dense irregular connective tissues.) Loose and dense connective tissue are distinguished by the ratio of ground substance to fibrous tissue.
Loose connective tissue is a category of connective tissue which includes areolar tissue, reticular tissue, and adipose tissue.

Brain

brain functionmammalian braincerebral
In the central nervous system, the three outer membranes (the meninges) that envelop the brain and spinal cord are composed of connective tissue.
Vertebrate brains are surrounded by a system of connective tissue membranes called meninges that separate the skull from the brain.

Tendon

tendonssinewtendinous
Dense regular connective tissue, found in structures such as tendons and ligaments, is characterized by collagen fibers arranged in an orderly parallel fashion, giving it tensile strength in one direction.
A tendon or sinew is a tough band of fibrous connective tissue that usually connects muscle to bone and is capable of withstanding tension.

Dense connective tissue

densedense fibrous connective tissue
Connective tissue can be broadly subdivided into connective tissue proper, and special connective tissue. Connective tissue proper consists of loose connective tissue and dense connective tissue (which is further subdivided into dense regular and dense irregular connective tissues.) Loose and dense connective tissue are distinguished by the ratio of ground substance to fibrous tissue.
Dense connective tissue, also called dense fibrous tissue, is a type of connective tissue with fibers as its main matrix element.

Mast cell

mast cellsanaphylactic degranulationmastocytes
The cells of connective tissue include fibroblasts, adipocytes, macrophages, mast cells and leucocytes.
Mast cells in rodents are classically divided into two subtypes: connective tissue-type mast cells and mucosal mast cells.

Adipose tissue

adiposebody fatfat
Special connective tissue consists of reticular connective tissue, adipose tissue, cartilage, bone, and blood.
In biology, adipose tissue, body fat, or simply fat is a loose connective tissue composed mostly of adipocytes.

Ligament

ligamentsknee ligamentcapsular ligaments
Dense regular connective tissue, found in structures such as tendons and ligaments, is characterized by collagen fibers arranged in an orderly parallel fashion, giving it tensile strength in one direction.
Ligaments are similar to tendons and fasciae as they are all made of connective tissue.

Reticular connective tissue

reticular laminalamina reticularisreticular
Special connective tissue consists of reticular connective tissue, adipose tissue, cartilage, bone, and blood.
Reticular connective tissue is a type of connective tissue with a network of reticular fibers, made of type III collagen (reticulum = net or network).

Bone

bone tissuecancellous bonecortical bone
Special connective tissue consists of reticular connective tissue, adipose tissue, cartilage, bone, and blood.
Bone tissue (osseous tissue) is a hard tissue, a type of dense connective tissue.

Macrophage

macrophagesTissue macrophagesCD68 + macrophages
The cells of connective tissue include fibroblasts, adipocytes, macrophages, mast cells and leucocytes.

Blood

human bloodhematologicalblood-forming
Special connective tissue consists of reticular connective tissue, adipose tissue, cartilage, bone, and blood.
In terms of anatomy and histology, blood is considered a specialized form of connective tissue, given its origin in the bones and the presence of potential molecular fibers in the form of fibrinogen.

Reticular fiber

reticulinreticularreticular fibers
In hematopoietic and lymphatic tissues, reticular fibers made by reticular cells provide the stroma—or structural support—for the parenchyma—or functional part—of the organ.
Reticular fibers, reticular fibres or reticulin is a type of fiber in connective tissue composed of type III collagen secreted by reticular cells.

Nervous tissue

neural tissuenerve tissuenerves
Connective tissue (CT) is one of the four basic types of animal tissue, along with epithelial tissue, muscle tissue, and nervous tissue.
Nerves are composed of myelinated and unmyelinated axons, Schwann cells surrounded by connective tissue.

Fibroblast

fibroblastsfeeder cellfibroblastic
The cells of connective tissue include fibroblasts, adipocytes, macrophages, mast cells and leucocytes.
Fibroblasts are the most common cells of connective tissue in animals.

Elastin

tropoelastinELNelastic
Elastic fibers, made from elastin and fibrillin, also provide resistance to stretch forces.
Elastin is a highly elastic protein in connective tissue and allows many tissues in the body to resume their shape after stretching or contracting.

Adipocyte

adipocytesfat cellsfat cell
The cells of connective tissue include fibroblasts, adipocytes, macrophages, mast cells and leucocytes.
Mesenchymal stem cells can differentiate into adipocytes, connective tissue, muscle or bone.

Mesenchyme

mesenchymalmesenchymal tissuemesenchymal tumor
Mesenchyme is a type of connective tissue found in developing organs of embryos that is capable of differentiation into all types of mature connective tissue.
Mesenchyme, in vertebrate embryology, is a type of connective tissue found mostly during the development of the embryo.

Proteoglycan

proteoglycansglyoproteinsproteochondroitin sulfate
Ground substance - A clear, colorless, and viscous fluid containing glycosaminoglycans and proteoglycans to fix the body water and the collagen fibers in the intercellular spaces. Ground substance slows the spread of pathogens.
Proteoglycans occur in the connective tissue.

Fibrillin

fibrillin-1
Elastic fibers, made from elastin and fibrillin, also provide resistance to stretch forces.
Fibrillin is a glycoprotein, which is essential for the formation of elastic fibers found in connective tissue.

Lymphatic system

lymphoidlymphoid tissuelymphatic
In hematopoietic and lymphatic tissues, reticular fibers made by reticular cells provide the stroma—or structural support—for the parenchyma—or functional part—of the organ. Other kinds of connective tissues include fibrous, elastic, and lymphoid connective tissues.
It consists of connective tissue formed of reticular fibers, with various types of leukocytes, (white blood cells), mostly lymphocytes enmeshed in it, through which the lymph passes.

Sarcoma

sarcomasreticulum cell sarcomaLow grade sarcomas
Connective tissue neoplasms including sarcomas such as hemangiopericytoma and malignant peripheral nerve sheath tumor in nervous tissue.
A sarcoma is a cancer that arises from transformed cells of mesenchymal (connective tissue) origin.

Marfan syndrome

MarfanMarfan's syndromeMarfanoid
Congenital diseases include Marfan syndrome and Ehlers-Danlos Syndrome.
Marfan syndrome (MFS) is a genetic disorder of the connective tissue.