Definition of personnel for English Language Learners. : 1  the people who work for a particular company or organization. : 2  a department within a company or organization that deals with the people who work for it.
This is a list of arteries of the human body. 1  The aorta. 2  The arteries of the head and neck The common carotid artery Relations. 3  The arteries of the upper extremity The subclavian artery.  The arteries of the trunk The descending aorta The thoracic 1  aorta. The arteries of the lower extremity The femoral artery.
Arthropods and mollusks have an open circulatory system. In this type of system, there is neither a true heart or capillaries as are found in humans. Instead of a heart, there are blood vessels that act as pumps to force the blood along. Instead of capillaries, blood vessels join directly with open sinuses.