The German cockroach will eat almost anything, but is particularly attracted to fermented foods and beverage residues (beer spills). If water is present, adults can live about a month without food, but young nymphs will die of starvation within 10 days. Without food or water, the adults die in less than two weeks.
The common carotid arteries split into two main branches â the internal carotid artery and the external carotid artery. The external carotid artery is the only division of the common carotid that gives branches to the neck region and supplies the external structures of the head and face.
There are two paired arteries which are responsible for the blood supply to the brain; the vertebral arteries, and the internal carotid arteries. These arteries arise in the neck, and ascend to the cranium. Within the cranial vault, the terminal branches of these arteries form an anastomotic circle, called the Circle of Willis. From this circle, branches arise which supply the majority of the cerebrum. Other parts of the CNS, such as the pons and spinal cord, are supplied by smaller branches from the vertebral arteries.