bony structures are grossly intact?
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“Grossly intact” means that the organ, in this case a part of the heart, does not show any evident irregularities in its appearance. To be sure, such a report does not exclude that there could be problems on the cellular or physiological lever. ... Hope that all your organs are grossly intact.
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If intact DNA is present in these dinosaur fossils, scientists may need to reappraise the molecule's ruggedness. Past studies have found that genetic material disintegrates in bones after a few million years. ... The preserved dinosaur cells were probably embedded in cartilage, Schweitzer says, which lacks pores.
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There are flat bones in the skull (occipital, parietal, frontal, nasal, lacrimal, and vomer), the thoracic cage (sternum and ribs), and the pelvis (ilium, ischium, and pubis). The function of flat bones is to protect internal organs such as the brain, heart, and pelvic organs.
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Almost every bone in your body is made of the same materials: The outer surface of bone is called the periosteum (say: pare-ee-OSS-tee-um). It's a thin, dense membrane that contains nerves and blood vessels that nourish the bone. The next layer is made up of compact bone.
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If you've ever seen a real skeleton or fossil in a museum, you might think that all bones are dead. Although bones in museums are dry, hard, or crumbly, the bones in your body are different. The bones that make up your skeleton are all very much alive, growing and changing all the time like other parts of your body.
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Protection – the bones of the skeleton protect the internal organs and reduce the risk of injury on impact. For example, the cranium protects the brain, the ribs offer protection to the heart and lungs, the vertebrae protect the spinal cord and the pelvis offers protection to the sensitive reproductive organs.
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Answer and Explanation: The axial skeleton contains the core skeletal structure without the limbs. It has three main parts: the skull, the vertebral column, and the thoracic...
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The main difference between bone and cartilage are listed below. Bones are the hard, inelastic and a tough organ that forms part of the vertebral skeleton. Cartilage is a soft, elastic and flexible connective tissue that protects the bone from rubbing against each other. Bones are of two types: compact or spongy.
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Immovable – the two or more bones are in close contact, but no movement can occur – for example, the bones of the skull. The joints of the skull are called sutures. Slightly movable – two or more bones are held together so tightly that only limited movement is permitted – for example, the vertebrae of the spine.
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The osteon or haversian system /həˈvɜːr. ʒən/ (named for Clopton Havers) is the fundamental functional unit of much compact bone. Osteons are roughly cylindrical structures that are typically between 0.25 mm and 0.35 mm in diameter.
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Bones are made of connective tissue reinforced with calcium and specialised bone cells. Most bones also contain bone marrow, where blood cells are made. Bones work with muscles and joints to hold our body together and support freedom of movement. This is called the musculoskeletal system.
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Compact bone has a sturdy calcified matrix with very few spaces. This layer not only forms a protective shell around the spongy bone tissue, but it also gives our bones their rigidity, strength, and resistance.
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['The skull, which contains 22 bones, from which 8 are cranial and 14 are facial,', '6 middle ear ossicles (3 in each ear),', '1 hyoid bone in the neck,', '26 bones of vertebral column,', '1 chest bone (sternum), and.', '24 ribs (12 pairs).']
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Fixed joints do not allow any movement of the bones, which protects the brain from injury. Partly movable joints allow only a little movement.
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Cancellous bone maintains an intricate balance of bone cells, marrow and other tissues vital for bone formation. It is as hard as cortical bone, but it is formed in such a way as to appear spongy or mesh-like.
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Answer and Explanation: Osteocytes are the fully matured form of bone cells. Bone cells begin their lives as undifferentiated osteogenic cells.
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All skeletons are made up of bones. Bones are rigid organs that form part of the endoskeleton of vertebrates. They function to move, support, and protect the various organs of the body, produce red and white blood cells and store minerals.