1. An effusion is a term for an excess accumulation of fluid in or around the knee joint. Doctors refer to it as an effusion. (Mayo Clinic,201)
2. An inflammation is a localized physical condition in which a part of the body becomes reddened and painful. It is usually reaction to an injury or infection. (WebMD)
3. The purpose of inflammation is a defense mechanism that eventually evolved in organisms to protect them from infection and injury. The purpose is to localize and eliminate the causing agent of the injury and to remove damage tissue components. (Encyclopedia Britannica,2014)
4. A MRI is used to investigate the anatomy of a certain part or the whole body. An x-ray would see the bones, while an MRI would be more in depth,and see the actual anatomy.
5. The type of tissue in the medial meniscus is fibrocartilage. (Cedars Sinai)
6. You would find type one collagen cells in the medial meniscus. (Kneeguru,2013)
7. The medial meniscus spans the knee joint between the medial condyle of the femur and medial condyle of the tibia. Fibrocartilage is flexible while still being tough. It’s also elastic being able to adhere to the force of anything that
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When a fracture happens, immediately following a hematoma forms and the blood begins to clot. As the blood clots, new blood vessels will invade the hematoma and soft callus will form around it. The hematoma is then replaced with granulation tissue and this type of tissue is a fibrous connective tissue. A bony callus will then form immediately after that and the new blood vessels will inhabit the soft callus. Osteoclasts will eventually degrade the cartilage of the soft callus and the osteoblasts will invade the soft callus. The osteoblasts replace that’s left of the granulation tissue and hyaline cartilage with a new bony matrix. Bone remolding will then start and the osteoclasts and blasts will remodel the hard callus and re-introduce the medullary cavity depending on where the break is located.
What is the physiologic mechanism causing the wound to become red, hot, swollen, and painful?How is this different than the inflammatory response that might occur in an internal organ?
However some of the basic bone functions include storing of crucial nutrients, minerals and lipids, producing red blood cells for the body, protect the organs such as heart, ribs and the brain, aide in movement and also to act as a buffer for pH. With the differences in all of the bones there are four things that remain the same in each bone, their cells. Bones are made up of four different cells; osteoblasts, osteoclasts, osteocytes and bone lining cells. Osteoblasts produce and secrete matrix proteins and then transport the minerals into the matrix. Osteoclasts are responsible for the breaking down of tissue. The osteoblasts and osteoclasts are both responsible for remodeling and rebuilding of bones as we grow and age. The production of osteoclasts for resorption is initiated by the hormone, the parathyroid hormone. Osteocytes are the mature versions of osteoblasts because they are trapped in the bone matrix they produced. The osteocytes that are trapped continue making bone to help with strength and the health of the bone matrix. The bone lining cells are found in the inactive bone surfaces which are typically found in
An osteoblast is a “baby” bone cell whose main job is to secrete osteoid which forms the hardened, or calcified, bone matrix. Osteocytes are formed from osteoblasts. Osteocytes are the mature bones cells that have been completely differentiated. They are found in the lacunae of hard bone and have a spider-like appearance due to their canaliculi. Osteoclasts are a different type of cell formed from the mesenchymal cells. These cells are not related to osteoblasts or osteocytes. Their job is to basically “eat” the bone to create cavities and other hallow spaces during bone remodeling. Finally, the cells form differentiate to form fibroblasts and fibrocytes. These fibroblasts and fibrocytes secrete and form the matrix for fibrous connective tissue which is an essential component of the
My interest in MRI started when I first read the book “MRI, The Basics” written by the author Ray Hashemi. By the time I successfully finished my MRI clinical placement in Tehran University of Medical Sciences, I knew for sure that MRI would be the field I would be choosing to take on. What attracts me most about MRI is how beautifully scientist could create a technology that can take advantage of the magnetic moments of human body for imaging it without any harms of ionizing radiation. Although there are drawbacks to MRI, combining it with other modalities would be a more effective approach to an accurate diagnosis.
The MRI, on the other hand is less expensive and much safer (as it doesn’t expose the patient to potentially harmful radioactive chemicals). The MRI or magnetic resonance imaging device, as an safer alternative, applies a powerful magnetic field around the head of the patient.
Researchers think that this immune system response may be triggered by bacteria or viruses, material in the intestinal contents, or a defective signal from the body’s own cells, called an autoimmune response. Inflammation results in pain, heat, redness, and swelling of the tissue. Chronic inflammation can harm the function of tissues and organs (U.S. News, 2009). Crohn’s disease also appears to affect certain ethnic groups more than others. American Jews of European descent are four to five times more likely to de... ...
The job of the immune system is to keep “foreign” invaders out of the body, or if one gets in, to seek it out and kill it. These foreign invaders are called pathogens, which are tiny organisms that can cause an infection in the body. Pathogens can be bacteria, parasites, and fungi (http://www.niaid.nih.gov/topics/immuneSystem/pages/whatisimmunesystem.aspx).
A meniscus is a wedge of tough, rubbery tissue in the knee. Each menisci stablizies the knee and absorbs shock. A discoid meniscus is a meniscus that is shaped differently than normal. It may be:
In order to understand how the menisci can be injured, you must understand the basic anatomy of the menisci and why they are important. The menisci are two oval (semilunar) fibrocartilages that deepen the articular facets of the tibia and cushion any stresses placed on the knee joint. They enhance the total stability of the knee, assist in the control of normal knee motion, and provide shock absorption against compression forces between the tibia and the femur (Booher, 2000). Articular cartilage covers the ends of the bones that make up the joint. The articular cartilage surface is a tough, very slick material that allows the surfaces to slide against one another without damage to either surface. This ability of the meniscus to spread out the force on the joint surfaces as we walk is important because it protects the articular cartilage from excessive forces occurring in any one area on the joint surface, leading to degeneration over time (Sutton, 1999).
In normal breathing, the lungs expand and contract easily and rhythmically within the ribcage. To facilitate this movement and lubricate the moving parts, each lung is enveloped in a moist, smooth, two-layered membrane (the pleura). The outer layer of this membrane lines the ribcage, and between the layers is a virtually imperceptible space (the pleural space), which permits the layers to glide gently across each other. If either of your pleurae becomes inflamed and roughened, the gliding process is impeded and you are suffering from pleurisy. Pleurisy is actually a symptom of an underlying disease rather than a disease in itself. The pleurae may become inflamed as a complication of a lung or chest infection such as pneumonia or tuberculosis, or the inflammation may be caused by a slight pneumothorax or chest injury. The pleural inflammation sometimes creates a further complication by causing fluid to seep into the pleural space, resulting in a condition known as pleural effusion. However, pleurisy is not the only condition that can lead to pleural effusion, it may also be produced by diseases such as rheumatoid arthritis, liver or kidney trouble or heart failure. Even cancer spreading from the lung, breast or ovary can cause pleural effusion. If you have pleurisy, it hurts to breathe deeply or cough, and chest pain is likely to be severe. Accompanying the pain are any other symptoms associated with the underlying disorder. The pain will disappear if a pleural effusion occurs as a consequence of pleurisy, because fluid stops the layers of the pleura from rubbing against each other; however, you may become breathless as the fluid accumulates. In most cases, the risks are those of the underlying cause. A big pleural effusion can compress the lungs and cause breathlessness. Any effusion may lead to empyema. A chest X-ray examination may be required.
One of the most recently new advances in radiology is the use of magnetic resonance imaging (MRI). MRI has been around for the past century. It was at first called Nuclear Magnetic Resonance (NMR) and then it changed to MRI once there was an available image. Walter Gerlach and Otto Stern were the first scientists to start experimenting with the magnetic imaging. Their very first experiment was looking at the magnetic moments of silver by using some type of x-ray beam. The scientists then discovered this was by realizing that the magnetic force in the equipment and in the object itself. In 1975, the first image was finally created using and MRI machine. The scientists used a Fourier Transformation machine to reconstruct images into 2D. The first images ever use diagnostically was in 1980. This is when hospitals began to use them. At first the images took hours to develop and were only used on the patients that needed it most. Even though MRI has been around for a long time, it has advanced and has been one of the best imaging modalities recently (Geva, 2006).
The common cold is a viral infection that can be cause by numerous things such as droplets in the air,and eating or touching your mouth or eyes without washing your hands. The reason you get so sick is because the virus attaches itself to some part of your respiratory tract. The body then sends white blood cells to get rid of it. Most of the time the white blood cells fail so the body sends more, and thus this is why inflammation occurs.
These statements explain the extraordinary importance of inflammation and how it can act as a double-edged sword: under specific stimulation they can produce factors and free radicals able to directly destroy tumor cells. However, it appears that some tumors can use the inflammatory responses for their own benefit to grow and move throughout the body.
A cold foot below the site of the ankle injury. This can occur if the blood vessels passing through your injured ankle were also damaged.
(A)Wound healing is a biological process occurring in the human body. In this lecture we had discussed about both acute and chronic wounds. An acute wound is an injury to the skin that occurs suddenly rather than over time. It heals at a predictable and expected rate according to the normal wound healing process. The chronic wounds do not heal in an orderly set of stages and in a predictable amount of time the way most wounds do.