Skeletal system
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
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The axial skeleton consists of bones that form the vertical axis of the body. These bones include: | show 🗑
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The appendicular skeleton includes the bones of the upper and lower extremities (the appendages). Each upper extremity includes: | show 🗑
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The lower extremities of the appendicular skeleton include: | show 🗑
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The intercellular matrix of bone tissue is arranged in multiple layers called _________ | show 🗑
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The matrix contains __________, which form 25% of the dry weight, and __________ | show 🗑
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What do calcium salts and collagen fibers do for a bone? | show 🗑
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What are the two types of bone tissue in the body? | show 🗑
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What is the basic functional unit of compact bone? | show 🗑
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Bone lamellae form an irregular arrangement of interconnecting bony struts in the spongy bone called | show 🗑
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show | bone marrow
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show | red bone marrow, where new blood cells are formed
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show | yellow bone marrow, a site for fat storage
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A ____________ travels through the center of each osteon | show 🗑
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The central canals are connected by cross channels known as ___________ | show 🗑
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__________ travel through the central and perforating canals | show 🗑
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Osteocytes are located between the ________ and within small cavities called __________ | show 🗑
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show | canaliculi
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show | epiphyses (two of them)
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The hollow space inside the diaphysis is the ___________ | show 🗑
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The medullary cavity of a typical matured adult long bone comes a ________________ | show 🗑
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show | diploe
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show | Study of internal structures in relation to features on the surface of the body
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show | fontanels
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show | vertebrae
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show | cervical vertbrae (7), thoracic vertebrae (12), lumbar vertebrae (5), fused vertebrae of sacrum (5), fused vertebrae of the coccyx (4)
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show | Primary curvatures
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The cervical and lumbar regions curves posteriorly. These are the ___________ of the vertebral column. | show 🗑
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The ____________ is the main anterior bony mass of each vertebra and is the part through which body weight is transmitted | show 🗑
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The vertebral bodies become progressively larger from ________ to _______ direction. | show 🗑
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The vertebral arch is formed by the _________ and _________ | show 🗑
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The pedicles project ______ from the body and form the lateral walls of the vertebral arch. The laminae travel ______ from the pedicles to form the roof | show 🗑
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show | Vertebral foramen
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What is the purpose of the intervertebral foramina? | show 🗑
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show | Separate the bodies of adjacent vertebrae. They are composed of fibrocartilage and are absent between the first and second cervical vertebrae and between the fused vertebrae in the sacrum and coccyx
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show | Synovial joints
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The ________ develops as five separate vertebrae | show 🗑
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What do the four transverse lines of the anterior surface of the sacrum indicate? | show 🗑
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show | median sacral crest; lateral sacral crests
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show | sacral promontory
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The _________ is the continuation of the vertebral canal. Roof of this is formed by the fusion of the laminae of the sacral vertebrae | show 🗑
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show | Sacral foramina
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This bone consists of three to five (usually four) fused vertebrae. It represent a vestige of an embryonic tail that usually disappears by the eighth week of development | show 🗑
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On each side, the auricular surface of the sacrum articulates with the pelvic girdle to form the ___________ | show 🗑
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show | transverse foramina (form a bony canal on each side for the passage of the vertebral arteries and veins)
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show | atlas
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show | atlantooccipital joint
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show | axis
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The ______ protrudes into the opening of the axis and is held against the anterior arch by a ligament. This arrangement forms the ________, where the "no" rotational motion of the head occurs | show 🗑
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show | costal facets
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The five lumbar vertebrae are located in the lower back, between the _____ and ______ | show 🗑
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Because the spinous process of C7 is much larger than those of the other cervical vertebrae, C7 is referred to as the ___________ | show 🗑
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show | the manubrium, the body, and the xiphoid process
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The superior margin of the manubrium is called the _________ | show 🗑
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The joint between the manubrium and the body acts as a hinge that allows the body to move anteriorly during inhalation. The angle formed at the joint is the _________ | show 🗑
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show | Costal cartilages
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show | true (vertebrosternal) ribs
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show | False ribs
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show | vertebrochondral ribs
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Ribs 11 and 12 are called ________ because they have no connection to the sternum | show 🗑
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The spaces between the ribs are called __________. Each space contains three layers of __________, which play an important role in respiration. | show 🗑
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show | head, facet, condyle, ramus, fossa
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show | tuberosity, crest, line, trochanter (femur only), tubercle, epicondyle, spine
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show | meatus, sinus, groove, fissure, foramen
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Created by:
JHaddad