3.1 Explain Why A Person With Type O Blood

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Essay question 3

1) Explain why a person with type O blood is referred to as the “universal donor”, yet can receive blood only from other individuals with type O blood
The universal blood type is blood containing A, B, and Rh antigens, this type of blood is known as type O negative. Individual con this kind of blood are consider an important blood donor because their blood can be donated to people of any blood type (Science 0nline, 2009).
Blood types is an important achievement of Karl Landsteiner’s research on blood. This research determine that there are three types of blood and its characteristics. The type A and B carry a specific and different protein or antigen while the third type do not contain either antigen. Karl Landsteiner was
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To increase cardiac output it is important because it causes that the body receive the enough blood and oxygen require for the normal operation the vital organs.” During intense aerobic activity, 60 percent or more of the cardiac output may go to the skeletal muscles” (Encyclopedia of Health and Medicine, 2006)
Increasing blood pressure forces cause that more blood goes to the heart, “down a steep pressure gradient” (Edme, 2016). In this case the heart must work hard in order to pump more blood in the body system. Decreasing in the arterial blood pressure causes the heart to work harder “more of the total heart volume actually ends up being ejected into the vasculature” (Edme, 2006).
The cardiac output is determined by two important factors: The amount of blood that is ejected per minute and the stroke volume. The stroke volume is the amount of blood that it is used to fill the heart and then this amount of blood will be ejected upon contraction. The blood ejected is the blood that is released into the system to support the normal operation of the viral organs. (Edme,

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