Human ventilation is also carried out by the respiratory system. It is used to breathe in oxygen for natural processes and then expel gaseous wastes, such as moisture, carbon dioxide and trace amounts of other gases. This system gives oxygen directly to the blood; the blood distributes the oxygen everywhere else.Continue Reading
The human respiratory system consists of a tube leading from the nose and mouth down to two lungs. The lungs have millions of specialized cells called alveoli. These cells filter oxygen from the rest of the gas breathed in for providing directly to the blood. This is possible because of the tiny blood vessels called capillaries that surround the alveoli.
Breathing is controlled by the expansion and contraction of the diaphragm. This dome-shaped muscle is located below the lungs, and it compresses and expands the lungs to make the body perform the subconscious reflex of breathing. The diaphragm does this about 12 to 20 times every minute, changing according to what an individual is doing.
People in a state of panic might hyperventilate, or breathe much faster than normal, in an effort to introduce more oxygen to the blood in an emergency. This biological reflex is one of the few that can be consciously controlled. Anyone hyperventilating can calm themselves down by forcing more measured breathing.Learn more about Human Anatomy
The circulatory system pumps blood around the body, and the respiratory system facilitates the gas exchange that keeps the blood fresh. According to HowStuffWorks, the heart is connected to the lungs via the pulmonary arteries and veins.Full Answer >
When the human circulatory system and veins are stretched out in a straight line, it has a total length of approximately 60,000 miles. The human veins circulate approximately 6 quarts of blood throughout the body on a daily basis.Full Answer >
Sometimes condensed into less than seven functions, the human urinary system acts to remove the waste products of urea and uric acid, regulate electrolytes, regulate the pH of blood, control blood volume, maintain blood pressure and expel other processed waste at the end of the system. The human urinary system, also called the renal system, is primarily composed of two kidneys that act as filters in the human body.Full Answer >
Course information from the University of Cincinnati states that the excretory system is important to the human body because without it, nitrogenous wastes would build up in blood and tissues to toxic levels. The kidneys play a major role, filtering the nitrogenous wastes from the blood and mixing them with water to make urine. The kidneys filter large volumes of blood every day for this purpose.Full Answer >