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What layer of skin has adipose connective tissue and large blood vessels?
Working from the outermost layer, the epidermis has no blood supply. The Dermis contains 2 main layers (plexi) of blood vessels, which can be referred to as the superficial dermal plexus and deep dermal plexus. More detail: The dermis can be split up into two layers, the papillary dermis and reticular dermis. One vascular plexus is situated in each. The superficial vascular plexus lies in the papillary dermis and is made mostly of capillaries. Capillary loops extend upwards towards (but not into) the epidermis and supply it with nutrients etc. The deep vascular plexus lies within the reticular dermis and is made mostly of venules, which drain the blood away from the skin back towards the heart. Larger vessels like veins and arteries are found in the subdermis a.k.a. subcutaneous layer and deeper (e.g. muscle).
What is the name of the thickest layer of epidermis?
The Stratum Germinativum is the deepest layer of the dermis also known as the Stratum Basale.
What fibers are found in intervertebral discs?
The fibers found in intervertebral discs are collagen fibers, primarily Type I and Type II collagen. These fibers provide structural support and help to resist tensile forces within the disc.
What are the two types of supporting connective tissues found in the body?
Loose Areolar CT: gel-like matrix with fibroblasts, macrophages, mast cells and collagen and elastic fibers, beneath epithelium, covering ventral organs, wraps & cushions organs.Adipose Tissue: closely packed adipocytes (fat-cells) Location = under skin (as subcutaneous layer), around kidneys and eyeballs, breasts, Functions = energy store, insulation, protection.Reticular CT: network of reticular fibers within loose ground substance and reticulocytes, Function = support.Dense Regular CT (White Fibrous CT), primarily collagen Location = tendons, ligaments, Poor blood supply = slow to no healing.Dense Irregular CT: primarily collagen fibers randomly arranged, Function = provides tensile strength.Elastic CT: primarily elastin fibers, Function = durability with stretch.Plus bone and blood are also considered as tissues.
What does non myelinated fibers look like?
Non-myelinated fibers appear as thin, unmyelinated axons within bundles of nerve fibers. They lack the myelin sheath that surrounds some other nerve fibers, which gives them a more transparent or grayish appearance compared to myelinated fibers. Non-myelinated fibers are typically smaller in diameter and conduct nerve impulses more slowly than myelinated fibers.
Lymphatic tissue contains an interlaced network of reticular fibers that function to?
provide structural support and create a framework for immune cell migration and interaction within the tissue. Reticular fibers also help trap pathogens and antigens for immune surveillance and response.
Where are fibroblasts located?
Fibroblasts are cells within a body that make collagen, glycoproteins, reticular and elastic fibers. They are mainly found in connective tissues.
What is the function of the dermis and what layers are contained within the dermis?
Dermis From Wikipedia, the free encyclopediaJump to: navigation, searchThis article is about the layer of skin. For the website, see DermIS (Dermatology Information System).DermisLatindermis; coriumCodeTH H3.12.00.1.03001 A graphic representation of the interface between skin epithelium and the underlying connective tissue. Zone B, indicating the region of overlapping projections of epithelium and connective tissue, is the papillary dermis. Zone C, indicating the region of dermis that lies immediately subjacent to the interdigitations of epithelium, is the reticular dermis.The dermis is a layer of skin between the epidermis (with which it makes up the cutis) and subcutaneous tissues, that consists of connective tissue and cushions the body from stress and strain. It is divided into two layers, the superficial area adjacent to the epidermis called the papillary region and a deep thicker area known as the reticular dermis.[1] The dermis is tightly connected to the epidermis through a basement membrane. Structural components of the dermis are collagen, elastic fibers, and extrafibrillar matrix (previously called ground substance).[2] It also contains Mechanoreceptors that provide the sense of touch and heat, hair follicles, sweat glands, sebaceous glands, apocrine glands, lymphatic vessels and blood vessels. Those blood vessels provide nourishment and waste removal for both dermal and epidermal cells.Components of the DermisThe dermis is composed of three major types of cells[3]: Fibroblasts, Macrophages, and Adipocytes. Apart from these cells, the dermis is also composed of matrix components such as collagen (which provides strength), elastin (which provides elasticity), the epidermis, and glycosaminoglycans.[3]LayersStratum papillareThe papillary region is composed of loose areolar connective tissue. This is named for its fingerlike projections called papillae, that extend toward the epidermis and contain either terminal networks of blood capillaries or tactile Meissner's corpuscles.[4] Stratum reticulareThe reticular region lies under the papillary region and is usually much thicker. It is composed of dense irregular connective tissue, and receives its name from the dense concentration of collagenous, elastic, and reticular fibers that weave throughout it. These protein fibers give the dermis its properties of strength, extensibility, and elasticity. Also located within the reticular region are the roots of the hair, sebaceous glands, sweat glands, receptors, nails, and blood vessels. Additional imagesEpidermis and dermis of human skin.Cross-section of all human skin layers.~fayechums~
What layer of skin has adipose connective tissue and large blood vessels?
Working from the outermost layer, the epidermis has no blood supply. The Dermis contains 2 main layers (plexi) of blood vessels, which can be referred to as the superficial dermal plexus and deep dermal plexus. More detail: The dermis can be split up into two layers, the papillary dermis and reticular dermis. One vascular plexus is situated in each. The superficial vascular plexus lies in the papillary dermis and is made mostly of capillaries. Capillary loops extend upwards towards (but not into) the epidermis and supply it with nutrients etc. The deep vascular plexus lies within the reticular dermis and is made mostly of venules, which drain the blood away from the skin back towards the heart. Larger vessels like veins and arteries are found in the subdermis a.k.a. subcutaneous layer and deeper (e.g. muscle).
The complex network of tiny islands of gray matter within the brain that activates the cerebral cortex to a state of wakefulness is the?
Reticular formation
Free nerve endings within the dermis?
Thermoreceptors
What kind of connective tissue is found within lymph nodes?
the chickenhead system
What are strands of hair grow within the dermis in structures called?
Pores
Which glands are attached to hair follicles within the dermis?
Sebaceous glands are associated with hair follicles within the dermis.
What are individual fibers wrapped within a CT sheath called?
Individual fibers wrapped within a CT sheath is called an endomysium.
Melanocytes lie within which layer of the skin?
stratum basale and upper dermis
What is the name of the thickest layer of epidermis?
The Stratum Germinativum is the deepest layer of the dermis also known as the Stratum Basale.
