The sacrum is formed by the fusion of five vertebrae.
Usually 5, I say usually because the body has it's variances amongst individuals. but when looking at a population, 95% will have 5 fused segments. so if this is a test question just go ahead and answer 5
The pelvis is formed of 3 fused bones: the illium, ishium, and pubis. The sacrum is formed of 5 fused bones. And the coccyx is formed of 2-4 bones.
They are the bones at the bottom of your spine. Often called the tailbone it is the fused section of 3-5 bones below the sacrum.
The sacrum, which consists of 5 fused bones, and the coccyx are below the lumbar vertebrae in the spine.
The vertebrae consist of the vertebral body, spinous process, transverse process, and articular processes. There are 33 vertebrae in total, including 7 cervical vertebrae, 12 thoracic vertebrae, 5 lumbar vertebrae, 5 sacral vertebrae (fused into the sacrum), and 4 coccygeal vertebrae (fused into the coccyx).
There are 7 cervical vertebrae, 12 thoracic vertebrae, 5 lumbar vertebrae, the 5 sacral vertebrae fused to form the sacrum, and the 4 coccygeal vertebrae fused to form the coccyx. Depending on the way you count the number of bones, it comes to as few as 26 bones (just the fused sacrum and fused coccyx are counted) or 33 bones (if you count each bone that is fused).
There are 7 cervical, 12 thoracic, 5 lumbar, 5 sacrum and 4 coccyx (fused) - making 33 bones in total.
I believe what you are talking about is the sacrum? It's just below the spine in the pelvic area..
The sacrum is the posterior portion of the pelvis. The pelvis is similar to a shallow bowl and the sacrum is one of the three bones that make up the bowl. The sacrum is made of 5 fused vertebra. This lack of the sacrum is called Sacral Agenesis and is a birth defect. The improper development of the sacrum leads to other defects that include abnormalities of the urinary and lower digestive system as well as defects to the legs such as fused legs. The suspected cause of Sacral Agenesis is believed to be Folic Acid deficiency during fetal development.
The vertebral column usually consists of 33 vertebrae: 24presacral vertebrae (7 cervical, 12 thoracic, and 5 lumbar) followed by the sacrum (5 fused sacral vertebrae) and the coccyx (4 frequently fused coccygeal vertebrae).
The spine is composed of 33 movable segments called vertebrae. These vertebrae are divided into five regions: cervical (7 vertebrae), thoracic (12 vertebrae), lumbar (5 vertebrae), sacrum (5 fused vertebrae), and coccyx (4 fused vertebrae).