In this diagram of a duplicated chromosome, (2) identifies the centromereâthe region that joins the two sister chromatids, or each half of the chromosome. In prophase of mitosis, specialized regions on centromeres called kinetochores attach chromosomes to spindle fibers. The centromere is the part of a chromosome that links sister chromatids or a dyad. During mitosis, spindle fibers attach to the centromere via the kinetochore. Centromeres were first thought to be genetic loci that direct the behavior of chromosomes.
Carotid Artery Pain in Left Side of Neck. The carotid artery pain in left side of neck means (if this is the case) that there may be carotid artery disease which is when the arteries that supply the brain (its front) with oxygenated blood, get narrowed.hen the carotid arteries get dilated or distended the carotidynia occurs. It has 3 types: classic, migrainous and arteriosclerotic, and all of them lead to pain in left side of neck, as well as to face, head or ear pain.
The carotid arteries are the main arteries on either side of your neck that supply the head and neck with oxygenated blood. You have two carotid arteries, one on the left side of your neck and one on the right side.If you put your fingertips on the side of your neck, you will feel a pulse. That is your carotid artery.The carotid arteries divide into internal and external carotid arteries.he carotid arteries are paired arteries in the neck that serve as the major blood supply to the brain. Carotid Artery Disease is when one or both arteries in your neck become narrowed due to accumulation of plaque.