Question

D. Long answer questions:

3. Why are there 26 vertebrae in an adult spine? Discuss.​

Answer 1

The spine is made up of 33 vertebrae.

More than 13 million neurons are found in the spine.

Adults only have 26 vertebrae because bones fuse together as we age.

There are 220 ligaments in the spine.

There are 7 vertebraes in the necks of humans and giraffes.

The spine has over 120 muscles.

There are 5 spinal cord regions:

7 cervical vertebrae

12 thoracic vertebrae

5 lumbar sacrum fused vertebrae

4 coccyx fused vertebrae

The spine has over 100 joints

The 4 coccyx vertebraes fuse together to form the tail bone

The average weight of the spinal cord is 35 grams

The spine has 3 important functions:

movement of the trunk

support for the body and respiratory function

protect the spinal cord & nerve structures

Primary motions of the spine:

flexion (forward)

extension ((backward)

bending (left & right)

rotation (central axis)

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Answer 2

★Question :

➙ Why are there 26 vertebrae in an adult spine? Discuss.

★Answer :

➙ Adults only have 26 vertebrae because bones fuse together as we age .

★Knowledge Pool :

➙ The spine is made of 33 vertebrae .

➙ There are 220 ligaments in spine

➙ There are 7 vertebrae in the neck of human and giraffe

➙ There are 5 spinal cord regions

• ᠉ 7 cervical vertebrae
• ᠉ 12 thoracic vertebrae
• ᠉ 5 lumbar sacrum fused vertebrae
• ᠉ 4 coccyx fused vertebrae

➙ The spine has over hundred joints

➙ The average weight of spinal cord is 35 gm

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