Vertebral column

Chapter 7 - The skeleton (part b) provides knowledge of vertebral column and thoracic cage. This chapter describe the structure of the vertebral column, list its components, and describe its curvatures; indicate a common function of the spinal curvatures and the intervertebral discs; name and describe the bones of the thoracic cage (bony thorax); differentiate true from false ribs.

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We purified pancreatic deoxyribonuclease I (DNase I) from the shark Heterodontus japonicususing three-step column chromatography. Although its enzymatic properties resem-bled those of other vertebrateDNases I, sharkDNase I was unique inbeingabasicprotein.Full-lengthcDNAs encoding theDNases I of two shark species,H. japonicusandTriakis scyllia, were constructed from their total pancreatic RNAs using RACE.

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Spinal Muscles The spinal muscles are a complicated group of muscles that pass along the back of the animal from the pelvis to the middle of the neck. Each muscle consists of numerous overlapping bundles that continuously originate and insert along the spine. They lie on either side of the upper surface of the vertebral column, separated by the upright spines. This powerful muscle group consists of four units: the longissimus, the iliocostalis, the spinalis & semispinalis, and the multifidus, all of which may be divided into regional components (cervicis, thoracis & lumborum).

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