Q. 6 - Biology

Question

All of the following are groups of vertebrae except ________, which is a curvature. 

1. thoracic 
2. cervical 
3. lumbar 
4. pelvic 

Step-by-Step Solution

Answer

The correct answer is option (d).

The groups of vertebrae are cervical, thoracic and lumber except pelvic, which is an  curvature.  

Vertebrae and their function

• The center axis of every vertebrate's skeleton is the vertebral column, commonly referred to as the spinal column.
• Cervical, thoracic, lumbar, sacral, and coccyx vertebrae are numbered and split into these five zones. 
•  The vertebral column supports the trunk, serves as a point of attachment for muscles, and shields the spinal cord.

Step: 1 Explanation for Correct answer

• The pelvis, a portion of the body under the abdomen that is between the hip bones, is where the bladder and rectum are located.
• The pelvis is an organ-protecting structure with a basin shape that supports the spinal column. 
• A closed structure made possible by the pelvic bone's curvature and lined by a variety of muscles. Hence correct answer is option d .

Step: 2 Explanation for incorrect answer

• The 33 distinct bones that connect to one another to form the spinal column are known as vertebrae.
• The upper 24 bones of the coccyx and sacrum are flexible, whereas the lower vertebrae are fixed. 
•  The cervical, thoracic, lumbar, sacral, and coccyx vertebrae are numbered and classified into these sections. Therefore, options a, b, and d are also wrong.