Tissue growth and repair
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This document summarizes tissue growth, repair, and aging. It discusses the body's physical and immune defenses at the tissue level. When tissue is injured, the healing process begins through inflammation and regeneration or fibrosis. The type of tissue damaged and severity of injury determine whether regeneration or scar tissue formation occurs. After injury, capillaries become permeable and granulation tissue forms to allow healing as the surface epithelium regenerates. Over time, tissues experience changes due to aging, including thinning epithelia, weakened bones and connective tissue, and muscle and nervous tissue atrophy.
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Week 2 Response need to classmate post> 150 words Anatomy physicology
Review tissue damage, inflammation and tissue repair by reviewing an example of this in any part of the body .
If you are walking barefoot and step on a nail and it penetrates your skin(epidermis), this will cause tissue damage. The penetrated area of the foot will begin to feel pain, the area around the break will bleed(because of ruptured blood vessels), swell and turn red. The area may even feel a bit more warm then the rest of your foot. This is a result of inflammation. The body is isolating harmful agents(bacteria from the nail) from the rest of the body, using chemical mediators which cause these symptoms. Dilation of the blood vessels(heat and redness), is helping white blood cells to move quickly to the injured site to help fight infection. The pain is cause by edema which is a result of clotting proteins and osmosis moving to the damaged tissues also causing the swelling. These responses will look like a wound filling up with blood and over time beginning to clot.The white blood cells, called neutrophils, will ingest all the bacteria and tissue debris clearing the area for repair. Regeneration will occur and new cells with the same function will develop. The epithelial tissues cells are classified as labile, meaning they can continue divide through out their life. Stepping on a nail should heal through primary union. The edges are close enough together. While. the wound is filled with blood a clot will form, filled with fibrin, when it dries it will form a scab, sealing the wound from infection. During the scabbing the neutrophils are killed and can accumulate as pus. Fibroblasts from the surrounding connective tissue migrate into the clot and produce collagen and other extracellular matrix components. Capillaries will begin to grow and the clot will be replaced by granulation tissue. Granulation tissue is fibroblasts, collagen and capillaries Granulation tissue turns into a scar, the scar will be bright red as a result of the amount of blood vessels present, it then whitens as the amount of collagen increases and then the vascular channels are compressed.
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aging effect on mobility.pdf
This document discusses how aging affects mobility and independence through changes in muscles, tendons, bones, skin, vascular, neurological, and psychological systems. Key effects of aging include muscle weakness and decreased circulation, loss of bone density and joint cartilage, thinning skin more prone to breaks, peripheral vascular disease, decreased sensation and coordination, fear of falling, and loss of independence. Prevention focuses on in-home support, physical therapy, social support, and adaptive equipment to improve function and maintain independence.
Anatomy Kyle
There are four main types of tissues in the body: epithelial, connective, muscle, and nervous tissue. Epithelial tissue covers surfaces and forms glands. It is classified as simple or stratified depending on the number of cell layers. Connective tissue is the most abundant tissue and includes connective tissue proper, cartilage, bone, and blood. It binds and supports other tissues. Muscle tissue includes skeletal, cardiac, and smooth muscle that enable movement and contraction. Nervous tissue transmits electrical signals throughout the body in the brain, spinal cord, and nerves.
Histological processes during regeneration
The document summarizes the histological processes that occur during regeneration in animals like salamanders and newts. It describes the key stages as: 1) wound healing through blood clotting and epithelial cell migration, 2) demolition and removal of damaged tissue through autolysis and phagocytosis, 3) de-differentiation of surrounding cells back to an embryonic state, 4) blastema formation through accumulation of de-differentiated cells under the wound epithelium, 5) growth of the blastema through cell division, and 6) re-differentiation of blastema cells to form the regenerated tissues, bones, muscles and other structures.
Animal Tissues And Homeostasis
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Week 2 Response need to classmate post 150 words Anatomy physicol.docx
Week 2 Response need to classmate post 150 words Anatomy physicol.docx
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- 1. Tissue Growth and Repair