Give reason for the following
The backbone is not one straight bone
but is made up af many small bon
Answers
Answer:
it is made of many vertebrae
Explanation:
so it is not single bone
Answer:
The answer is in the explanation below.
Explanation:
The spine (or backbone) runs from the base of the skull to the pelvis. *It serves as a pillar to support the body's weight and to protect the spinal cord* . There are three natural curves in the spine that give it an "S" shape when viewed from the side. These curves help the spine withstand great amounts of stress by providing a more even distribution of body weight.
The spine is made up of a series of bones that are stacked like blocks on top of each other with cushions called discs in between to help absorb shock/load.
The spine is divided into three regions:
Cervical spine — The cervical spine (or neck) is the uppermost part of the spine. There are seven vertebrae within the cervical spine, numbered C1 to C7 from top to bottom. The first two vertebrae of the cervical spine are specialized to allow for neck movement. C1 (also called the atlas like atlas holding the world) sits between the skull and the rest of the spine. C2 (also called the axis) has a bony projection (odontoid process) that fits within a hole in the atlas to allow rotation of the neck. The first spinal curve is located at the cervical spine. It bends slightly inward, resembling a "C." This inward curve is called a lordotic curve.
Thoracic spine — There are 12 vertebrae (T1 to T12) in the chest section, called the thoracic spine. The ribs attach to the spine on the thoracic vertebrae. The curve of the thoracic spine bends outward like a backward "C" and is called a kyphotic curve.
Lumbar spine — The lumbar spine (or lower back) usually consists of five vertebrae numbered L1 to L5. (Some people have six lumbar vertebrae.) The lumbar spine, which connects the thoracic spine and the pelvis, bears the bulk of the body's weight and are the largest vertebrae. The curve of the lumbar spine also bends inward (lordotic curve).
Hope you got the answer.
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