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Yes. There are twelve thoracic vertebrae and a pair of ribs associated with each of them.
The individual units of the backbone are called vertebrae.
Each individual bone in your back is a vertebra (plural vertebrae).
Thoracic vertebrae are attached to a pair of ribs
A pair of spectacles has an individual lense, one for each eye.
the individual bones of the spine are called "Vertebrae"
Each thoracic vertebrae is associated with a pair of ribs; therefore, there are 12 pairs of ribs around the chest cavity.
There are three parts of the spine, the cervical, thoracic and lumbar. Each vertebrae is listed by its number. For example the first 7 vertebrae (from the top) are listed as C1-C7 meaning C for cervical. The thoracic vertebrae starts after C7, the 8th vertebrae is T1-T12, so there is 12 individual vertebraes in the thoracic spine. After the thoracic, is the lumbar which have 5 individual vertebrae, L1-L5.
Individual vertebrae make up the spinal cord.
The chromosomes in each pair of chromosomes are called diploid chromosomes.
When you get wire that is a shielded pair, you get two individual conductors that are each individually insulated from each other, and the pair is twisted and wrapped with a thin layer of foil to provide electromagnetic shielding to the pair. Occationally you'll see the pair is surrounded with a braided shield, but not commonly. That's your shielded pair.