Hair Cells (Ear)

Hair cells sensory cells that are part of the organ of Corti is located in the cochlea in the inner ear. Extension has a very thin, hair-shaped, estereocilias called, stand on the middle level are in contact with endolymph. The function of the hair cells is to convert sound vibrations into nerve impulses that travel to the occipital lobe of the brain via the auditory nerve.

Organ of Corti

Spiral structure of the organ of Corti is formed by the hair cells and supporting neuroepithelial cells. Lying on the basement membrane in the bottom half of the scale, along the cochlea of the inner ear canal, forming a spiral. One can say that the organ of Corti is the auditory center, because it is a place where sound waves are converted into pulses nervisos.

Vertical cut the cochlea which houses the organ of Corti

Hemosiderosis

Hemosiderosis calls for storing large amounts of hemosiderin in the organ. Hemosiderin is a protein that stores iron in the body, is a derivative of hemoglobin released during hemolysis (destruction of erythrocytes). Hemosiderosis be recognized macroscopically and in the liver, spleen, pancreas, lymph nodes, etc., ochraceous color. Given to these organs. Histology mainly hemosiderin granules in the cells of the reticuloendothelial system, but also in liver cells in the epithelial cells uriniferous tubes (nephrons, etc.).

Hemosiderosis can be observed as a result of repeated blood transfusions are very broad (transfusional Siderosis) and diseases accompanied by intense blood damage, especially in pernicious anemia. In the lungs also saw marked hemosiderosis, as a result of stasis in the smaller circle has taken a lot of small volume bleeding. Alveolar epithelial then phagocytosed red blood cells to form hemosiderin. When they were expelled in sputum, which is the so-called cardiac cells (cell lesions of the valve), the process is particularly seen in patients with heart valve lesions (mitral valve disease).

Cochlea

The cochlea is the auditory portion of the inner ear, because it is the organ of Corti. It has a spiral structure, with the emergence of a small spiral, and embedded in the temporal bone. The cochlea is divided into three tubular cavity running the spiral staircase: the scala vestibuli, scala media, and scala tympani, the first and the last one is filled with a liquid called perilimfe, but scala media is filled with endolymph, the other fluid types. Vestibuli The scala and scala tympani are connected at the top of the cochlea (the snail), a type of ship called helicotrema communicate. Organ of Corti, which contains neuroepithelial hair cells, the vibrations are transmitted to the cochlea with the bracket through fenestra ovalis (oval window), into nerve impulses that are picked up by the auditory nerve.

Soft Tissue Fibrosarcoma

Soft tissue fibrosarcoma tumor was malignant tissue. These tumors occur for some time with the good looks fool, which contrasts with the real structure with a large tendency for late recurrence and generalizations. Therefore the interest of early detection. These fibroids develop in filling network and support from all parts of the body: partition and fascias involve muscles, nerves and vessels, showed marked propensity for the extremities. Originally presented as a solitary tumor, the volume varies from size of a walnut to the size of a small orange, but eventually reach a much larger dimension.

In the surgical specimen, the soft tissue fibrosarcomas were packed solid mass. However, the envelope, which is constant, there are barriers that isolate different conjunctiva but is formed by the surface layer of the same tumor, level and strong. They have a very encuenta data, as described excision successive relapse and need extensive subcapsular tumor excision. Mass itself, the court is homogeneous, firm, fibrous appearance and a matte white or grayish white. It consists of connective fusiform cells with large nuclei, without proper guidance, but tend to be arranged around the blood vessels in the wall where they belong. The ship was disorganized, branched, of different calibres.

 Recurrence-law, where, after a simple excision, is characteristic of the soft fibroma, a deceptive ease of removal, but after a variable period of full years, almost always new tumor appears under the surgical scar. This tumor recurrence showed a greater tendency to proliferate, as if the transaction had the potential latent elevated her virulent. Thus, the way to the root of the groin, leg or armpit. Therefore it is said, with a sense of mnemonic, this tumor has a "geotropism" negative. The tumor again and again. Progress of the disease and amputations imposed pathology report in the end, the only way to prolong life for some time.