Mrs. Debbie Morgan is a 45-year-old female who works as a stocking clerk for a local home improvement store. While she was at work today a large box of metal rivets fell from a 20-ft.-high overhead shelf, striking her outstretched arm and knocking her to the ground. The ambulance personnel reported that she had lost quite a bit of blood at the accident scene and was “knocked out” when they arrived. To minimize further hemorrhage, the paramedics applied a pressure bandage to her arm.
You meet the paramedics as they bring Mrs. Morgan into the emergency room and begin to assess her for injuries. She is awake and alert, but complaining of severe left arm and back pain, plus she has a “killer headache.” To fully examine her injuries you remove four blood-soaked bandages from her arm. You notice a large open wound on her arm with what appears to be bone tissue sticking out of the skin. She also has bruises covering her left shoulder, left wrist, and lower back. To determine the extent of her injuries Mrs. Morgan undergoes several x-rays, which reveal the following:
1)The anatomical structure that contains blood vessels and nerves in the compact bone is known as Haversian canals. Severe bleeding and exposure of bone in open wound point to the presence of injury to the Haversian canals of bone.
2) Fibrocartilage is made up of type 1 collagen fibres. The callus is formed by fibroblasts and chondroblasts. They lay down fibrous cinnectibe tissue and cartilage respectively.
3) the formation of newborn tissue is called osteogenesis or ossification. The cell involved in this process is known as osteoblast.
4) breaking dawn of osseous tissue is call bone resorption. Osteoclast responsible for resorption of osseous tissue.
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