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The anatomy books show what are normally seen, five vertebra... There are many variants in anatomy, and someone with four lumbar vertebras isn't abnormal, just someone who is a little different, but still normal. You might have something we call a "transitional" vertebra, such as an extra thoracic vertebra merged into a lumbar, or maybe a lumbar vertebra fused with a sacral vertebra... Still normal...
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How many lumbar vertebrae are on the human body?
The human spine is made up of three parts, the cervical spine(neck), the thoracic(middle), and the lumbar (lower back). The lumbar consists of 5 vertebrae in the average adult human, but may also only have 4 or 6 vertebrae depending on the individual, although this is not as common.
Where is the invertebrate in the human body?
Assuming you mean vertebrae; The human spine is made up of 33 vertebrae (Sungular: vertebra.) There are four sections of vertebrae. The cervical vertebrae is is made up of 7 vertebrae and makes up the neck. The thoracic vertebrae makes up the upper back and contains 12 vertebrae. the lumbar vertebrae area makes up the lower back between the thoracic vetrtabrae and the sacral curve, made up of 5 vertebrae. Lastly, The tailbone area is below the lumbar section and called the sacral curve. 5 vertebrae make up the sacrum and 4 are fused to make the tailbone. All vertebrae but the sacral curve section are separated by invertebral discs.
How many bones are in the spinal cord?
The vertebrae
What is a common name for the latissimus dorsi?
The origins of the latissimus dorsi are: - spinous processes of the lower six thoracic vertebrae - lumbar vertebrae - sacral vertebrae - lower three or four ribs
What is L5 - S1 located?
They are the names of specific vertebrae in the spine. The anatomy of the spine is sectioned for better identification and specificity. There is the neck area, the cervical spine; the main upper part of the back is the thoracic spine; the area at the "small of the back" is the lumbar spine; the part below that is the Sacral spine (also called the sacrum) which is five fused together vertebrae; and then finally the tailbone is called the coccyx and is actually four fused vertebrae. Each of the vertebra in a section is numbered. There are normally 33 vertebrae in humans (counting the fused ones). There are 7 in the cervical area, 12 in the thoracic area, 5 in the lumbar area, and the 9 making up the sacrum and coccyx. So L5 is the fifth Lumbar vertebra (counting from the top down). It is also the most common vertebra involved in lumbar disorders and low back pain. It is the last of the lumbar vertebrae. L4 is in the general area of the waist or at the highest point of the pelvic bones. So just down from there is L5 and S1 is the next one down.
How many vertebrae do horses have?
Fifty four (54) vertebrae for the typical horse. Cervical vertebrae: 7: the neck Thoracic vertebrae: 18 : the back, above rib cage Lumbar vertebrae: 6: the back, just above and forward of rear hip bones Sacral vertebrae (5 fused together - sacrum): just above and behind rear hip bones Coccygeal vertebrae (average 18): the tail source: http://www.kersur.net/~santa/skeletalsystem.html source: http://www.allabouthorses.com/horse-health/injuries/horse-anatomy.html
How many ribs would a half quarter half Arabian horse have?
The breed has 17 ribs, five lumbar bones and sixteen tail vertebrae. All other breeds have 18 ribs, six lumbar bones and eighteen tail vertebrae. Answer2: Arabians display a higher rate of having less ribs and vertebrae, but generally this is because two vertebrae bones tend to be fused together making it look like one bone instead of two. All other breeds of horse have the ability to be born with one less rib or vertebrae also, which means this trait is not unique to the Arabian breed.
What are the four sections of the spine?
In human anatomy the spinal column has been divided into four sections for reference and specificity; the cervical spine, the thoracic spine, the lumbar spine and the sacral spine. The Cervical Spine is the section in the neck area comprised of seven vertebrae starting at the base of the skull and counting down the spine. To refer to the individual vertebrae in that area you would again start at the base of the skull with C1, and then count down to the last cervical vetebra, C7. The cervical spine is made up of C1, C2, C3, C4, C5, C6, and C7. The Thoracic Spine is the next section down the back located in the chest area and is comprised of twelve vetebrae. The ribs connect to the thoracic spine and create a strong skeletal structure that protects the vital organs. The vertebrae in the thoracic spine start with the eighth vertebra down which is called T1 and continued through T12. The third major region of the spine, the Lumbar Spine,starts below the thoracic spine with the thirteenth vertebra, L1, and continues through L5 for most people, although it is not uncommon for some people to have a sixth Lumbar verterbra, L6. When you have a low backache, it is usually in the area of the Lumbar Spine since it is the part of the vertebral column that supports most of the body's weight. The final section of the spine continues from the last lumbar vertebra, number seventeen (or eighteen, if there are six in this section) and down to the pelvis. This is called the Sacral Spine and has only one vertebra, the sacrum, called S1, and the coccyx bone which is also known as the tail bone. The sacrum and coccyx are uniquely shaped.
What are the bones in your back bone called?
What is often called the spine refers to a group of bone known as the vertebral column. This column is composed of vertebrae, the sacrum, and the coccyx. 2nd Answer: The spine is more specifically composed of the neck bones, or "C" vertebrae, so-called because their true names are "Cervical". There are 5 of these, the top two being also called the Atlas and the Axis. Next, named after the thorax of the body are the thoracic, or "T" vertebrae. There are 12 of these, T-1 through T-12. The small of the back, or Lumbar area, is composed of 5 "L", or Lumbar bones. The two spinal section between the 2 rear bones of the hips is actually part of the spine: The Sacrum. There are usually 5 "S" or Sacral vertebrae, and they are usually all fused together in adulthood. They sit like a wedge between the hipbones. And at the very bottom are the 3 or 4 bones of the coccyx, or "Tailbone". These coccygial bones are also fused together by adulthood.
What is the name of a four sided triangles name?
A triangle, by definition, can have only three sides. So a four sided triangle simply cannot exist!A triangle, by definition, can have only three sides. So a four sided triangle simply cannot exist!A triangle, by definition, can have only three sides. So a four sided triangle simply cannot exist!A triangle, by definition, can have only three sides. So a four sided triangle simply cannot exist!
Do only four bald eagles exist in the United States?
NO!
What are the four parts of the vertebral column?
Cervical Thoracic Lumbar Sacral
