The adult human vertebral column has 26 vertebrae arranged from the skull down: cervical (7), thoracic (12), lumbar (5), sacral (1 fused from 5), and coccygeal (1 fused from 4). Memory hook: "C7, T12, L5, S1, C1" adds to 26 because the sacrum and coccyx are each counted as one fused bone. NEET asks this number and the top-to-bottom order almost every year, so lock 26 and the sequence cervical to coccyx.
The five regions of the vertebral column from skull to tail-end, showing why the adult count is 26 after the sacrum and coccyx fuse.
Your doubts, answered
Why do we say 26 vertebrae when the embryo has 33?
In the embryo there are 33 separate vertebrae. During growth the 5 sacral vertebrae fuse into a single sacrum, and the 4 coccygeal vertebrae fuse into a single coccyx. So we count them as 1 + 1 instead of 5 + 4. That is why the adult count drops from 33 to 26 (7 + 12 + 5 + 1 + 1 = 26). NEET's answer is 26, not 33.
What is the correct order of the vertebral column from head to toe?
Starting from the skull and going downward: cervical, then thoracic, then lumbar, then sacral (sacrum), then coccygeal (coccyx). A common trap swaps thoracic and lumbar. Remember neck (cervical) is at the top and the tail-end coccyx is at the bottom.
Is the sacrum one bone or five?
In an adult it is one bone called the sacrum, but it is formed by the fusion of 5 vertebrae. NCERT writes it as 'sacral (1-fused)'. The same idea applies to the coccyx: 1 bone formed by 4 fused vertebrae. This fusion is exactly why the count is 26.
How is the vertebral column different from the whole spine numbers people quote?
Some books quote 33 (embryonic separate units) and NCERT quotes 26 (adult, after fusion). For NEET always use the NCERT adult value of 26. The column is dorsally placed, extends from the base of the skull, and forms the main framework of the trunk.
Which vertebra is the atlas and what does it do?
The first vertebra is the atlas. It articulates with the two occipital condyles of the skull (the dicondylic skull), forming the atlanto-occipital joint that lets you nod your head. The atlas belongs to the cervical region. The joint between atlas and axis (the second vertebra) is a pivot joint.
What are the functions of the vertebral column for NEET?
Three NCERT functions: it protects the spinal cord (which passes through the neural canal of each vertebra), it supports the head, and it is the point of attachment for the ribs and the muscles of the back. Each vertebra has a central hollow neural canal for the spinal cord.
⚠️ The NEET trap ✗ The human vertebral column has 33 vertebrae. ✓ The adult human vertebral column has 26 vertebrae, because the 5 sacral fuse into one sacrum and the 4 coccygeal fuse into one coccyx (7 + 12 + 5 + 1 + 1 = 26). 🧠 33 is the embryonic count before fusion; NCERT and NEET want the adult count 26.
Real NEET questions
ReNEET 2026
The number of vertebrae in a human is ________.
A · 7
B · 12
C · 26 ✓
D · 206
Solution: The adult human vertebral column is made of 26 vertebrae. The embryonic 33 fuse: cervical 7, thoracic 12, lumbar 5, sacrum 1 (fused from 5), coccyx 1 (fused from 4) = 26. 206 is the total number of bones in the body, not the vertebrae.
NEET 2026
Which of the following is the correct order of arrangement of the vertebral column from head to toe?
A · Cervical, thoracic, sacrum, lumbar
B · Sacrum, lumbar, thoracic, cervical
C · Cervical, lumbar, thoracic, sacrum
D · Cervical, thoracic, lumbar, sacrum ✓
Solution: From the skull downward the column runs cervical (7) then thoracic (12) then lumbar (5) then sacral then coccygeal. So the head-to-toe order is cervical, thoracic, lumbar, sacrum. Options that swap thoracic and lumbar, or start from the sacrum, are wrong.
NEET 2026
Which statements are correct about the human endoskeleton? A. Skull is monocondylic. B. The joint between any two adjoining vertebrae is a cartilaginous joint. C. Number of cervical vertebrae is seven. D. All ribs except the last 2 pairs are bicephalic. E. The occipital bone of skull is articulated with atlas vertebra.
A · B and E only
B · B, C and E only ✓
C · C, D and E only
D · A, B and D only
Solution: B, C and E are correct. A is wrong: the human skull is dicondylic (two occipital condyles), not monocondylic. C is correct: there are seven cervical vertebrae. E is correct: the atlas articulates with the occipital condyles. D is wrong: ALL ribs (not all except the last two pairs) are bicephalic.
Solved Locomotion and Movement NEET PYQs
Try the real previous-year questions from this chapter — each with the answer and a full solution.
