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How are thoracic vertebrae 11 and 12 different from all the other thoracic vertebrae?
Thoracic vertebrae 11 and 12 are unique because they only have one costal facet on each side for articulating with ribs (compared to two on each side in other thoracic vertebrae). They also lack a transverse costal facet on their transverse process.
Which type of vertebra has facets that articulate with the tubercle of the ribs?
The thoracic vertebra
What are the 26 small backbones?
Typically there are 7 vertebrae in the neck called cervical vertebrae. They are commonly called C1-C7. The first cervical vertebra is also called the atlas, and the second, the axis. Typically there are twelve thoracic vertebrae to which the ribs attach. Typically there are five lumbar vertebrae in the lower back. Caudal ('toward the tail' or below in the standing position) to the lumbar vertebrae is the sacrum. Caudal the the sacrum is the coccyx. It is often called the tailbone. Commonly, the coccyx is formed by two or three segments. Many people have a sixth lumbar vertebra which is usually a part of the sacrum which did not fuse to the other segments of the sacrum during development. Sometimes a vertebra, usually a thoracic vertebra, fully develops on only one side, so one might say there are 12 vertebrae on one side, and 11 on the other. That is called a hemivertebra. Sometimes 2 vertebrae are fused together, making one bone instead of two.
What ribs do not articulate with the sternum?
Floating ribs (ribs 11 and 12) do not articulate with the sternum directly but are attached only to the thoracic vertebrae in the back. They are considered "floating" because they lack an attachment to the sternum or cartilage.
How many ribs articulate with the thoracic vertebrae and how many with the sternum?
There are 12 pairs of ribs that articulate with the thoracic vertebrae, one per vertebra. The upper 7 pairs of ribs articulate directly with the sternum, either via their own costal cartilage or the cartilage of the rib above. Ribs 8-10 articulate indirectly with the sternum through a shared cartilage, while ribs 11 and 12 are floating ribs that do not connect to the sternum.
Where is the t-12 located in your back?
The T-12 vertebra is located in the lower part of the thoracic spine, just above the lumbar region. It is the last of the twelve thoracic vertebrae and is situated between the T-11 vertebra above and the L-1 vertebra below. The T-12 vertebra plays a crucial role in supporting the rib cage and facilitating movement in the back.
How many vertebrae are in a whale's spine?
preferabley a whale has 51 vertabrea in its spine
How many backbones does a bird have?
Birds have one backbone that consists of various numbers of vertebrae. There are 11 to 25 cervical vertebrae (neck), the synsacrum (fused vertebrae of the back connected to the pelvis), and the pygostyle (tail bone).
How many vertebrae are in a giraffe spine?
A giraffe's cervical spine, like most mammals, has 7 vertebrae. They are, however, about 11 inches long.
Which pairs of ribs are known as floating ribs?
Lower most two pairs of ribs (11th and 12th) are known as floating ribs because they are only attached to vertebrae but not to the sternum.
When does assassins creed revelations come out in different countries?
In Australia its the 15/11/11, i dont know about any other countries.
How many bones do giraffes have in their necks?
Just like us, the giraffe has 7 neck vertebrae. There vertebrae is just longer making their neck longer and appear to have more bones.Seven, the same number humans have, but the ones a giraffe has are much larger. Giraffes posses seven neck bones (known as vertebrae) in their necks, the same as our necks, but they are elongated are separated by highly flexible joints. Giraffes have 7 neck vertebrae, the exact same number as other mammals, but they are much larger and elongated.Giraffes possess seven vertebrae (although disputed by some zoologists who claim that it has eight)That is not quite true - Giraffes have seven vertebrae in their neck, but also have thoracic lumbar, sacral and coccygeal vertebrae. The numbers of coccygeal vertebrae can vary, but I think giraffes have a total of about 50 vertebrae.There are seven vertebrae in a giraffe's neck, just like humans. Just like humans and most mammals, a giraffe has seven neck bones. But those are really, really BIG bones. see the link for more info about GiraffesA giraffe has seven bones in its neck the same as a human. A giraffes vertabrates are just longer than that of a human because a human doesnt need to have a long neck in order to reach their main food source, giraffes do because their main food source is off of Acai trees.There are seven bones in the giraffe neck! just like the human! can you believe that!!??A giraffe only has 7 - just like a human. They are just longer, as much as 11" long.They have seven, which is the same number that humans have. Interestingly, the only mammals to have a different number are the manatee and 3 toed sloth, which have 6.There are 7 bones in a giraffe's neck.7Interestingly enough, only seven, just like a human.
