Blood pressure - blood vessels, Biology

Blood Pressure - Blood Vessels

We are all familiar with the term high blood pressure. What exactly is blood pressure? By blood pressure we mean arterial blood pressure. During a heartbeat cycle the maximum pressure is referred to as systolic pressure and the minimum diastolic pressure. The difference between the two is the pulse pressure. Blood pressure is generally expressed in millimetres of mercury and as systolic/diastolic, that is 120/80 mm Hg.

2040_Blood Pressure - Blood Vessels.png

Figure:  Change in blood pressure in different parts of the circulation. The major drop occurs in the arterioles

Blood is 12.9 times less dense than mercury so a blood pressure of 120 mm Hg is equal to 120 x 12.9 = 1550 mm or 155 cm of blood. In other words if the blood vessel was to be opened suddenly the blood would squirt out to a maximum height of 155 cm above the cut. Pressure generated by the heart decreases due to the flow of blood. Figure shows blood pressures in the circulatory system of man. The blood pressure falls as blood flows from the aorta to the vena cava. The greatest pressure drop takes place in the smallest arterioles which by changing their diameter can regulate the flow of blood to various body organs.

Posted Date: 1/15/2013 11:51:56 PM | Location : United States







Related Discussions:- Blood pressure - blood vessels, Assignment Help, Ask Question on Blood pressure - blood vessels, Get Answer, Expert's Help, Blood pressure - blood vessels Discussions

Write discussion on Blood pressure - blood vessels
Your posts are moderated
Related Questions
you tested three different treatments for ripening bananas. Before you did the lab, which one did you think would have ripened most? State your hypothesis and explain your reason

Q. Which are the cell organelles that participate in cell division and in the formation of cillia and flagella of some eukaryotic cells? The organelles that participate in the

Check Screws- Check screw access holes for closure. If screw access holes are uncovered, such as the bar-retained dentures, make sure that are free from debris. If screws can b

Q. What is the kind of life cycle present in pteridophytes? Like all plants pteridophytes present diplobiontic (alternation of metagenesis or generations,) life cycle.

HETEROTROPHI C NUTRITION Animals derive organic food materials by consuming products of plants - Heterotrophic nutrition. T ype s of Heterotrophic Nutrition (i ) H

A drug has a molec. weight of 200. How many grams would you use to make 100 ml of a solution that is isotonic (for man)? Assume that the diluent is distilled water and that the dru

what are the examples of parasitic plants

Explain the Uses of ISP in Infant formulas Infant formulas  Infant formulas, where milk solids have been changed by soy products, are well established commercial products

How to calculate the raw score for each scale The raw score for each scale is the sum of the 0, 1 and 2 item scores. Thus, the higher the score, the poorer the performance. Th

Carbomedics Valve :  Almost similar to StJude Medical valve, his is a low profile bileaflet valve made of pyrolitic carbon. On echo cardiography four small jets of regurg