Advertisements
Advertisements
प्रश्न
Describe the bones of vertebral column.
उत्तर
The vertebral column is made up of 33 r ing shaped bones called vertebrae. A typical vertebra has a main body or centrum and a neural canal in the centre of the neural arch, arising from the sides of the centrum. Neural spine is a flat, longitudinal projection. There are side projections called transverse processes. The articular facets help in j oining the two adj a cent vertebrae.
Vertebral column is divided into the following five parts:
(i) Cervical region - It has seven cervical vertebrae. First vertebra is called atlas, second is axis while the resta re called typical cervical vertebrae.
(ii) Thoracic region - It has 12 thoracic vertebrae. Neural spine of these vertebrae is long and pointed, which provides surface for muscle attachment.
(iii) Lumbar region - Has 5 lumbar vertebrae.
(iv) Sacral region - Has 5 sacral vertebrae which are permanently fused to each other.
(v) Caudal region - Has 4 caudal vertebrae, which are fused to form a triangular structure called coccyx .
APPEARS IN
संबंधित प्रश्न
What are bones made of? Are the bones living or non living? Give reasons.
Name the longest and the smallest bone of the human body.
How many vertebrae are found in human neck? Give their names.
Name the bones that make up upper arm and lower limb of man.
The diagram below represents the forelimb of man.
(a) Label the parts marked 1 to 9.
(b) Mention the antagonistic muscles.
(c) Which muscle will contract when the hand is bent?
(d} Name the main bone of pectoral girdle.
(e) Name the type of joint present in shoulder girdle.
The place where two or more bones are connected is called a ______.
Answer the following question in your words.
What should you do to keep your bones strong and healthy?
The forearm has two bones.
Provide one-word answers to the statement given below
Bones which enclose the organs of our body that lie below the abdomen.
Bones are hard structures and cannot be bent. But, we can still bend our elbow, knee, etc. How is this possible?
