WGU C458 QUESTIONS AND ANSWERS ALREADY GRADED A+

Define the key structures and organs associated with the respiratory system The cardiovascular system consists of the heart (a powerful muscular pump) and blood vessels. The primary function of the cardiovascular system is to transport a constant supply of nutrients and oxygen to body cells through the flow of blood. Heart: The heart is responsible for circulating blood throughout the body. It is located on the left side of the chest cavity between the lungs and beneath the sternum. The heart is a pump that consists of four chambers: two upper chambers called atria and two lower chambers called ventricles. Blood Vessels: There are two categories of blood vessels: arteries and veins. Arteries carry blood away from the heart to the body tissues. Veins carry oxygen-poor blood back to the heart. The respiratory system consists of the lungs, passageways for air flow, blood vessels, and muscles. These elements work together to bring oxygen into the body and expel carbon dioxide that is produced during metabolism. The urinary system, also called the renal system, balances the fluids in your body by stimulating thirst and producing, storing, and eliminating urine 1.) the kidneys are major organs in the urinary system. Humans have two bean-shaped kidneys. Each is about the size of a fist. They are located in the abdominal cavity on either side of the spine. 2.) Connected to each kidney is a ureter. The urine flows out of the kidneys through the ureter to the urinary bladder. 3.) The bladder is the temporary holding reservoir for urine. Once the bladder is full, the body has the urge to urinate. 4.) Once the urine starts to flow, it travels through the urethra and is expelled from the body. The endocrine system is an information signaling system, much like the