How many vertebrae is the vertebral column composed of?

In humans, the vertebral column usually consists of 33 vertebrae, placed in series and connected by ligaments and intervertebral discs. However, the number of vertebrae can vary between 32 and 35. Usually there are 7 cervical, 12 thoracic, 5 lumbar, 5 sacral and 4 caudal (coccygeal) vertebrae.

How are the 24 vertebrae divided?

The adult vertebral column consists of 24 vertebrae, plus the sacrum and coccyx. The vertebrae are divided into three regions: cervical C1–C7 vertebrae, thoracic T1–T12 vertebrae, and lumbar L1–L5 vertebrae.

What are the 26 vertebrae called?

spine
The spine, also known as the vertebral column or spinal column, is a column of 26 bones in an adult body — 24 separate vertebrae interspaced with cartilage, and then additionally the sacrum and coccyx.

Are there 26 bones in the vertebral column?

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.

What are the vertebral column?

The vertebral column encloses the spinal cord and the fluid surrounding the spinal cord. Also called backbone, spinal column, and spine. The vertebrae (back bones) of the spine include the cervical spine (C1-C7), thoracic spine (T1-T12), lumbar spine (L1-L5), sacral spine (S1-S5), and the tailbone.

How many vertebrae are in each section?

Each section is made up of individual bones, called vertebrae. There are 7 cervical vertebrae, 12 thoracic vertebrae, and 5 lumbar vertebrae.

Why the number of vertebrae in the vertebral column is reduced to 24?

The average person is born with 33 individual bones (the vertebrae) that interact and connect with each other through flexible joints called facets. By the time a person becomes an adult most have only 24 vertebrae because some vertebrae at the bottom end of the spine fuse together during normal growth and development.

What structure is responsible for articulating with the vertebral column?

Facet joints are paired (left, right sides) at the back of each vertebral body (C3-L5). Sometimes these joints are called zygapophyseal or apophyseal joints. These joints help stabilize the spine while allowing flexion (bending forward), extension (bending backward) and twisting movement (called articulation).

What is vertebral column?

(ver-TEE-brul KAH-lum) The bones, muscles, tendons, and other tissues that reach from the base of the skull to the tailbone. The vertebral column encloses the spinal cord and the fluid surrounding the spinal cord. Also called backbone, spinal column, and spine. Enlarge.

How the vertebrae are numbered?

The vertebrae are numbered and divided into regions: cervical, thoracic, lumbar, sacrum, and coccyx (Fig. 2). Only the top 24 bones are moveable; the vertebrae of the sacrum and coccyx are fused. The vertebrae in each region have unique features that help them perform their main functions.

What is vertebral column Class 9?

It is also known as the vertebral column. The vertebral column is a part of the axial skeleton, which comprises the skull, ribs and sternum other than the vertebral column. Each vertebra has a central hollow portion, which forms the neural canal through which the spinal cord passes. The spine protects the spinal cord.

What is the vertebral column?

How many vertebrae are in the column?

The vertebral column is a series of approximately 33 bones called vertebrae, which are separated by intervertebral discs. The column can be divided into five different regions, with each region characterised by a different vertebral structure .

How many vertebrae are articulating and separated from each other?

The upper 24 pre-sacral vertebrae are articulating and separated from each other by intervertebral discs, and the lower nine are fused in adults, five in the sacrum and four in the coccyx, or tailbone. The articulating vertebrae are named according to their region of the spine.

What is the surface anatomy of the vertebral column?

Individual vertebrae of the human vertebral column can be felt and used as surface anatomy, with reference points are taken from the middle of the vertebral body.

What is the function of the vertebral column articulation?

This articulation supports the vertebral column and transmits the weight of the trunk through the hip joints and to the lower limbs. The vertebral column is composed of small segments of bone called vertebrae. In early life, the vertebral column usually consists of 33 small, irregularly shaped bones.