Which of the following is not a type of connective tissue?
Types of connective tissue – what is connective tissue
The features of connective tissue’s cellular and extracellular components are used to identify it. The type of cells, the structure and type of fibers, and the composition of the extracellular matrix are the most important factors.
Embryonic connective tissue forms during the embryo’s development. Mesenchyme gives rise to the body’s different connective tissues. Mucoid connective tissue is a gelatinous material present in mucoid connective tissue.
Microbes, cellular waste, and foreign objects are engulfed and digested by macrophages, which are phagocytic cells. Monocytes form in the bone marrow, circulate in the bloodstream, and migrate into connective tissue, where they become macrophages.
Mast cells release molecules that dilate blood vessels and draw more immune cells to the region where they are activated. Agranular progenitor mast cells form in the bone marrow, circulate in the bloodstream, and migrate to connective tissue, where they proliferate and differentiate into mature mast cells (granular).
Types of tissue part 2: connective tissue
A matrix of living cells and a non-living material known as the ground substance make up connective tissues. An organic substance (usually a protein) and an inorganic substance make up the ground substance (usually a mineral or water). The fibroblast is the most important cell in connective tissues. Fibers are produced by this cell and can be found in almost all connective tissues. Fibroblasts are mobile, capable of mitosis, and capable of synthesizing any connective tissue necessary. Some tissues include macrophages, lymphocytes, and, on rare occasions, leukocytes. Specialized cells are present in some tissues but not in others. The matrix in connective tissues determines the density of the tissue. If a connective tissue has a high concentration of cells or fibers, the matrix density is proportionally smaller.
Collagen, elastic, and reticular fibers are the organic component or protein fibers contained in connective tissues. Collagen fibers give tissue its resilience, preventing it from being torn or removed from its surroundings. Elastic fibers are made up of the protein elastin, which can extend to one-half its original length before returning to its original size and shape. Elastic fibers give tissues their versatility. The third form of protein fiber contained in connective tissues is reticular fibers. This fiber is made up of thin collagen strands that form a network of fibers that support the tissue and other organs to which it is attached. Table 1 summarizes the different types of connective tissues, the types of cells and fibers they are made of, and tissue sample locations.
Connective tissues – types and functions i class 9 i learn
This is a dense irregular connective tissue example. The dermis is the layer of skin that lies under the epidermis. Collagen fibers and fibroblasts are present. A tiny capillary can also be seen at the top of the image (not labeled) – can you spot it?
A thick woven network of collagenous (and some elastic) fibres in a viscous matrix makes up this type of tissue. It can be present in joint capsules, the connective tissue that surrounds muscles (muscle fascia), and the skin’s dermis. It has a high impact resistance.
Collagen fibers are tightly packed and arranged in parallel in this type of tissue. Ligaments (which bind bone to bone at joints) and tendons contain this type of tissue (connections between bones or cartilage and muscle). These are highly resistant to axially loaded tension forces while still allowing for some stretch.
Types of connective tissues: crash course a&p #5
Connective tissues serve a variety of roles in the body, the most important of which is to protect and connect other tissues, such as the connective tissue sheath that wraps a muscle, the tendons that connect muscles to bones, and the skeleton that holds the body in place. Another important feature of connective tissue is protection, which is provided by fibrous capsules and bones that protect fragile organs. Connective tissue contains specialized cells that protect the body from microorganisms that invade the body. Specialized fluid connective tissues, such as blood and lymph, transport gases, nutrients, waste, and chemical messengers. Adipose cells store excess energy in the form of fat and aid in the body’s thermal insulation.
The mesodermal layer of the embryo gives rise to all connective tissues (see Figure 4.2.2). Mesenchyme, the stem cell line from which all connective tissues are derived, is the first connective tissue to develop in the embryo. Adult tissue contains clusters of mesenchymal cells that supply the cells required for replacement and recovery after a connective tissue injury. Mucous connective tissue, also known as Wharton’s jelly, develops in the umbilical cord as a second type of embryonic connective tissue. After birth, this tissue vanishes, leaving only dispersed mesenchymal cells in the body.