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        | A vertical plane passing through the mid-line of the body that divides the body into equal left and right halves. |  | 
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        | Any plane parallel to the median plane.  A midsagittal plane is the same thing as the median plane. |  | 
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        | A vertical plane that is at a right angle to the median plane.  Divides the body into front and back portions. |  | 
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        | Transverse Horizontal Plane |  | Definition 
 
        | A plane at a right angle to the median plane.  Divides the body into upper and lower portions. |  | 
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        | Situated above another structure; nearer to the head. |  | 
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        | Situated below another structure; nearer the foot. |  | 
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        | Related to the cranium (head); toward the head. |  | 
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        | Toward the tail region (coccyx); useful directional term for embryos. |  | 
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        | In front of; toward the front (belly) surface of the body. |  | 
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        | In back of; toward the back surface of the body. |  | 
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        | Used in place of anterior when describing parts of the brain; toward the rostrum (beak). |  | 
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        | Nearer the median plane; toward the midline. |  | 
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        | Farther from the median plane; away from the midline. |  | 
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        | For a limb, it refers to being nearer to the attachment of the limb to the trunk; for a linear structure, it refers to being nearer to the origin of the structure. |  | 
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        | Term 
 | Definition 
 
        | For a limb, it refers to being farther form the attachment of the limb to the trunk; for a linear structure, it refers to being nearer to the origin of the structure. |  | 
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        | Nearer to the surface of the body. |  | 
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        | Farther from the surface of the body. |  | 
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        | Away from the center of a body cavity or hollow part of an organ-used when describing layers of the body wall or layers in the wall of a hollow organ. |  | 
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 | Definition 
 
        | Toward the center of a body cavity or hollow part of an organ- used when describing layers of the wall or layers in the wall for a hollow organ. |  | 
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        | The skeletal elements along the central axis of the body. |  | 
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        | the skeletal elements in the limbs (appendages). |  | 
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        | is the "brain case" that houses the brain and its protective covering |  | 
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        | The name given for compressed or fractured vertebral bodies.  This is potentially dangerous to the spinal cord within the vertebral canal. |  | 
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        | Is an increase in the curve of the thoracic spine.  An exaggerated kyphosis in the thoracic region produces rounded shoulders and a "hump back."  Can be caused by poor posture, disk problems, or osteoporosis. |  | 
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        | Term 
 | Definition 
 
        | Is an increased in the curve of the lumbar spine.  An exaggerated lordosis in the lumbar region justs the buttocks posteriorly and produces a "sway back" or "saddle back".  Can be due to obesity or muscular problems in the hip region. |  | 
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        | is the surgical removal of a lamina in order to expose the contents of the vertebral canal or to repair a herniated inter-vertebral disk. |  | 
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        | Involve the bones of the viscerocranium.  They most often result from blunt injuries such as motor vehicle accidents, bar fights, sports trauma, occupational injuries, and falls. |  | 
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        | an incision through the midline of the sternum allowing surgical access to the organs in the thoracic cavity. |  | 
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        | Is a disease of bones in which bone mineral density is reduced in bone tissue; this produces changes in the micro-anatomy of bones, weakens the bones, and increases the risk of fractures; it occurs in postmenopausal women and elderly men. |  | 
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        | Is an abnormal lateral curvature of the vertebral column. |  | 
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        | Term 
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        | Is a defect in the vertebral column marked by an absence of the vertebral arches, through which the spinal cord and/or its protective coverings may protrude. |  | 
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        | Is the grafting of new bone-forming cells (from periosteum) between the bodies of adjacent vertebrae after damages inter-vertebral discs have be removed. |  | 
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