Question

how many vertebrae are present in the human body? Name them.please tell fast as it is urgent.

Answer 1

ANSWER:

• there are 26 vertebrae in adult human body and 33 vertebrae in human embryo.

• they are divided into five major types.

• they are cervical vertebrae, thoracic vertebrae, lumbar vertebrae , sacral vertebrae and coccygeal vertebrae.

CERVICAL VERTEBRAE:

• these are present in neck region.

• the number of cervical vertebrae are 7

• the first cervical vertebrae is called atlas

• the second cervical vertebrae is called axis

• the Atlas is attached to the occipital condyl of cranium by pivot joint

THORACIC VERTEBRAE:

• these are present in chest region.

• the number of thoracic vertebrae is 12

• thoracic vertebrae is associated with ribs

• the thoracic vertebrae in the back, the sternum in the front, the ribs together form rib cage.

• important organs like heart and lungs are protected safely inside the rib cage.

LUMBAR VERTEBRAE:

• these are present in abdominal region

• there are 5 lumbar vertebrae.

• lumbar vertebrae are usually broader and stronger than other vertebrae.

SACRAL VERTEBRAE:

• these are present in pelvic region.

• the number of sacral vertebrae in adult is one.

• it is formed of the fusion of 5 bones.

• these sacral vertebrae are fused to form single vertebrae called sacrum

COCCYGEAL VERTEBRAE:

• this vertebrae is also present in pelvic region.

• it is called coccyx or tail bone.it is a single bone

• coccyx is surrounded by two coxal bones or hip bone.

• it is also formed of fusion of four bones and appear as a single bone.

NOTE:

• for human embryo all vertebral numbers are same except for sacral bone and coccygeal bone

• the number of sacral bone in embryo is 5.

• the number of coccygeal vertebrae is 4.

• so the total number of vertebrae in human embryo becomes 33

Answer 2

$\huge\star\underline\mathtt\purple{Question:-}$

how many vertebrae are present in the human body? Name them.

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$\huge\star\underline\mathtt\blue{Answer:-}$

• In Adult Human ‐ 26 Vertebrae
• In Human Embryo - 33 Vertebrae

There are 5 major Vertebrae in human body:

— Cervical Vertebrae

— Thoracic Vertebrae

— Lumber Vertebrae

— Sacral Vertebrae

— Coccygeal Vertebrae

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$\huge\star\underline\mathtt\green{Explanation:-}$

$\small\red{\sf { Cervical Vertebrae }}$

• The cervical spine functions to provide mobility and stability to the head while connecting it to the relatively immobile thoracic spine.

• The movement of nodding the head takes place predominantly through flexion and extension at the joint between the atlas and the occipital bone, the atlanto-occipital joint.

$\small\red{\sf { Thoracic Vertebrae }}$

• The main function of the thoracic spine is to hold the rib cage and protect the heart and lungs.

• The main functions of the vertebral bones are for structure ( posture ) and protection of the spinal cord.

$\small\red{\sf { Lumber Vertebrae}}$

• The main function of the lumbar spine is to bear the weight of the body.

• The five lumbar vertebrae are numbered L1 to L5.

• These vertebrae are much larger in size to absorb the stress of lifting and carrying heavy objects.

$\small\red{\sf { sacral Vertebrae}}$

• The main function of the sacrum is to connect the spine to the hip bones (iliac).

• There are five sacral vertebrae, which are fused together. Together with the iliac bones, they form a ring called the pelvic girdle.

$\small\red{\sf { Coccygeal Vertebrae}}$

• The coccyx is not entirely useless in humans, based on the fact that the coccyx has attachments to various muscles, tendons and ligaments.
• However, these muscles, tendons and ligaments are also attached at many other points, to stronger structures than the coccyx.

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