What forms an enclosure for the spinal cord?
What forms an enclosure for the spinal cord?
All the ribs and thoracic vertebrae together form the thoracic cage which surrounds and protects the heart and lungs. The abdominal portion of the spine is formed by five lumbar vertebrae, referred to as L1 through L5.
What structures form the vertebral arch?
The vertebral arch (or neural arch) is the posterior part of a vertebra. It consists of a pair of pedicles and a pair of laminae, and supports seven processes: four articular processes.
What permits flexibility in the vertebral column?
Intervertebral discs are also flexible and can change shape to allow for movements of the vertebral column. Each intervertebral disc consists of two parts.
Which vertebral structure is the cavity that encloses the spinal cord?
In combination with the vertebral body, the vertebral arch forms an enclosed hole – the vertebral foramen. The foramina of all the vertebrae line up to form the vertebral canal, which encloses the spinal cord.
What are the 5 interconnected parts of the spine?
As mentioned above, our vertebrae are numbered and divided into five regions: cervical, thoracic, lumbar, sacrum, and coccyx.
What is the weight-bearing portion of a vertebra called?
a. Body. The body is the disc-shaped anterior portion, and is the weight-bearing area of a vertebra.
What are the three components of the vertebral arch?
There are thirty-three vertebrae in the human vertebral column—seven cervical vertebrae, twelve thoracic vertebrae, five lumbar vertebrae, five fused sacral vertebrae forming the sacrum and three to five coccygeal vertebrae, forming the coccyx.
What is the difference between spinal cord and vertebral column?
The spinal cord is shorter than the length of the bony spinal column; the spinal cord extends down only to the last of the thoracic vertebrae. Nerves that extend from the spinal cord from the lumbar and sacral levels must run in the vertebral canal for a distance before they leave the vertebral column.
What are the three main weight-bearing parts of the vertebra?
The vertebral column has four curvatures, the cervical, thoracic, lumbar, and sacrococcygeal curves. The thoracic and sacrococcygeal curves are primary curves retained from the original fetal curvature. The cervical and lumbar curves develop after birth and thus are secondary curves.
Which of the following has odontoid process?
-The second cervical vertebrae is the pivot on which atlas turns in the rotary movement of the head. -The Odontoid process is a projection of the axis, a second cervical vertebra and joins the main body of the vertebra. Hence, the correct answer is option (C).
What is the cavity enclosing the spinal cord?
The spinal canal (or vertebral canal or spinal cavity) is the canal that contains the spinal cord within the vertebral column. The spinal canal is formed by the vertebrae through which the spinal cord passes. It is a process of the dorsal body cavity. This canal is enclosed within the foramen of the vertebrae.
Parts of a Typical Vertebra A typical vertebra consists of a body and a vertebral arch. The arch is formed by the paired pedicles and paired laminae. Arising from the vertebral arch are the transverse, spinous, superior articular, and inferior articular processes.
Which vertebrae carry the least weight on a human?
Cervical vertebrae have a small body, reflecting the fact that they carry the least amount of body weight. Cervical vertebrae usually have a bifid (Y-shaped) spinous process. The spinous processes of the C3–C6 vertebrae are short, but the spine of C7 is much longer.
Are there any bones that are joined by sutures?
With one exception, the skull bones are joined by sutures. Name the exception. With the exception of 2 paired bones (the parietal and temporal), are all single bones. 31. What bones are connected by the lambdoid suture?
How are bones connected by the lambdoid suture?
With the exception of 2 paired bones (the parietal and temporal), are all single bones. 31. What bones are connected by the lambdoid suture? connects the parietal and temporal bones with the occipital bone 32. What bones are connected by the squamous suture? temporal and parietal bones on each side of the skull. 33.
Which is part of the spinal cord allows a rocking motion?
suppors the head, allows a rocking motion in the conjunction with the occipital condyles vertebral foramen cavity enclosing the spinal cord body weight bearing portion of the vertebra spinous and transverse process provide levers against which muscles pull body and transverse process two structures that provides an articulation point for the ribs
What are the function of spinous and transverse processes?
spinous and transverse process provide levers against which muscles pull body and transverse process two structures that provides an articulation point for the ribs intervertebral foramina openings providing for exit of spinal nerves body and vertebral arch two structures that form an enclosure for the spinal cord YOU MIGHT ALSO LIKE…
How to identify the sutures on a bone?
Using choices from the numbered key to the right, identify all bones sutures (A, and bone markings ) provided with various leader lines in the two diagrams below. Some responses from the key will be used more than once.
Which is part of the body protects the spinal cord?
vertebral column bony thorax The vertebral column protects the spinal cord. The bony thorax protects the heart, lungs, esophagus, and great vessels (aorta and venae cavae) of the thorax. The skull protects the brain.
What are the secondary curvatures of the spine?
The “secondary” curvatures, the compensatory curvatures, occur with normal development. (Normal development is the condition under which they occur) These are the cervical curvature, which develops first with infant head lifting and the lumbar curvature, which develops next sitting up. These curvatures prepare the spine for ambulation.