In general, fibroblasts become very active during wound repair and healing process, when they proliferate and form fibrous matrix. The 3-dimensional nature of dense irregular connective tissue gives it a great deal of strength.
The collagen fibers are densely packed together and Dense fibrous connective tissue in parallel to each other. The tissue also forms some types of fasciawhich are supportive and protective membranes that surround muscles, muscle groupings, nerves, and blood vessels.
Tendons, skeletal muscles, and ligaments in health and disease, Lippincottpp. The myofibroblasts are characterized by the presence of actin filaments and dense bodies. Ligaments form from thick bundles of connective tissue, mainly forming from collagen. The collagenous fibers are irregularly arranged in interwoven sheets that makes the tissue very strong.
The compact arrangement of collagen fibres serves to resist stretch. This type of connective tissue also makes up fibrous capsules, which are protective sacs or membranes that surround internal organs, glands, and bones.
It can be found in a number of locations within the body, including the dermis of the skin, in glandular tissue, in the walls of organs, and in the whites of the eyes. Collagen fibers are tough, thick fibrous proteins found in dense connective tissues. Cytoplasm of young and active cells show basophilia due to the presence of high concentration of rough endoplasmic reticulum, mitochondria and many sets of Golgi apparatus.
Dense Regular Connective Tissue Dense regular connective tissue is mainly made up of type I collagen fibers. Where a tendon attaches to a bone, there is a transition from cartilage to mineralised cartilage to bone. Overall, these cells exhibit the properties of fibroblasts as well as smooth muscle cells.
Its function is to support the mucous membranes. They have large euchromatic nuclei with prominent nucleoli. Tendons and ligaments attach to bonesand the role of dense regular connective tissue is to transfer forces to bones.
Dense connective tissue - want to learn more about it? Our engaging videos, interactive quizzes, in-depth articles and HD atlas are here to get you top results faster. Dense connective tissue is often further divided into two main categories; dense irregular connective tissue and dense regular connective tissue.
A tendon comprises fascicles of collagen fibers, which run parallel along their axis. Three stranded collagen molecules are packed together to form collagen fibrils and their alignment yield characteristic ultrastructural striations. A small amount of ground substance is present around dense regular connective tissue fibers and cells.
Highlights Dense connective tissue, is one of the types of connective tissue also referred to as dense fibrous tissue due to relative abundance of the collagen fibers. Connective tissue provides support to the organs and tissues of the body and is separated into two types: Note thicker bundles of fibres, running in different directions.
The collagen fibers in dense irregular connective tissue are orientated randomly in a compact interwoven 3-dimensional web. The type of fascia that envelopes individual muscles, holds muscles together, and separates muscles into functional groups is called deep fascia, which is located under a layer called the superficial fascia.
Specialised form of fibroblasts known as myofibroblasts also appear during wound contraction. Dense regular collagenous connective tissue - histological slide Fibroblasts Fibroblasts are usually the most numerous cells in both forms of connective tissue.
In contrast, structures like tendons usually direct the force of a muscle in a single direction, so the collagen fibres run more or less parallel.
Aponeuroses are important in attaching bone to muscle. Dense Irregular Connective Tissue The type I collagen fibers of the dense irregular connective tissue are surrounded by small amounts of ground substance.
It also contains fewer cells and less ground substance in comparison with the other type, loose connective tissue. Dense irregular connective tissue - histological slide Dense irregular connective tissue is found in high concentrations in body parts where support is needed to prevent the effects of forces that pull in multiple directions.
Sign up for your free Kenhub account today and join oversuccessful anatomy students. Ligaments need to be strong as they connect bones together, and hold joints in place. Meanwhile, aponeuroses are flat sheets of collagen fibers that normally comprise numerous layers.
It is customary to describe dense conective tissue as "irregular" or "regular". They are present close to the collagen fibers and appear as flattened, fusiform or spindle shaped cells. This arrangement allows the fibers to have a good resistance to forces pulling along a single axis, but also gives some ability to stretch.
The fibers of dense regular connective tissue are arranged in parallel to each other unlike dense irregular connective tissue, which has an irregular pattern of fibers.
From the functional viewpoint it must be understood that even in "irregular" dense connective tissue, the collagen bundles are arranged to resist stretching in specific directions, and though the fibre bundles appear to run haphazardly, there is "order in the madness".Irregularly arranged fibrous connective tissues are found in areas of the body where stress occurs from all directions, such as the dermis of the skin.
Regular fibrous connective tissue, shown in Figure 2, is found in tendons (which connect muscles to bones) and ligaments (which connect bones to bones).
The connective tissues may be classified into loose connective tissues and dense connective tissues depending on their composition.
The dense connective tissue is a type of connective tissue proper that consists predominantly of fibers, especially type I collagen. Dense connective tissue, is one of the types of connective tissue also referred to as dense fibrous tissue due to relative abundance of the collagen fibers.
It also contains fewer cells and less ground substance in comparison with the other type, loose connective tissue. Breasts contain glandular, connective, and fat tissue. Breast density is a term that describes the relative amount of these different types of breast tissue as seen on a mammogram.
Dense breasts have relatively high amounts of glandular tissue and fibrous connective tissue and relatively low amounts. Dense regular fibrous tissue comprises the tendons, the aponeuroses, and the ligaments; dense irregular fibrous tissue comprises the fascial membranes, the dermis of.
Loose connective tissue, seen supporting an epithelium. Thin, wispy strands of fibres, scattered nuclei.
Compare with epithelium. Dense irregular connective tissue.
Note thicker bundles of fibres, running in different directions. Longitudinal section of tendon. The collagen bundles are thick and parallel.Download