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.Know More
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 >
A human act is an action that is considered to be carried out voluntarily, whereas an act of man is an involuntary action. The distinctions and nuances between an act of man and a human act are often a focus of philosophical debate.Full Answer >
Human characteristics include aspects such as standing upright, using tools to gather food or kill animals, and evolving different body shapes. Other aspects include brains that are continually growing bigger and more complex, using symbols and language, and developing a social system.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 >