why is the body's blood supply arranged in parallel and not series?
93538
The blood supply is arranged this way for many reasons.  A series connection would be one tube that wove through your entire body in a giant loop.  This would be very inefficient at blood distribution in a large creature like a human (although it may be fine for a small animal like a worm or insect).  Another major reason has to do with damage or blockages.  If you became wounded with a series connection there is no bypass for the blood.  All the cells after the wound would die from lack of oxygen and nutrients.  A final major reason has to do with blood pressure.  With a parallel conection the pressure is distributed evenly between the vessels, whereas in a series connection all the pressure goes into the one.  This limits the size and thickness of the in series vessel (if it were too small and thin it would burst).
630194
The system of veins and arteries that moves (circulates) the blood around in your body.
263918
well its actually true thet women tend to have blood less than men of same height weight staure and race. thi is because of one simple reason. that is male hormone testosterone. it stimulates bone marrow to produce more number of red blood cells thereby increasing the volume of blood directly. tall people or short people everyone has one set point of temperature 37 degress centigrade.
853184
Through our circulatory system or blood.
695395
The volume of blood flowing through the arteries is about the same as that flowing through the veins. It must be since it is a closed circulatory system. \nThe difference is in the internal diameter (lumen) of the vessels. The arteries have smaller lumen and more muscular structure, the veins have less muscle, are of less defined, larger lumen shape. Therefore blood flows slower in the veins, faster in the arteries, but the volume of blood is the same.
1107382
it doesn't normally get a lot of blood (unless it's hard).  same reason your hands/feet get cold.
648423
Blood supplies oxygen to all the parts of the body, thus enabling all the organs and systems to continue to function. Without blood and the movement of it through your body, your body would shut down due to oxygen deprivation. The respiratory system provides the oxygen via breathing and then sends it everywhere via the cardio(heart) vascular(veins and arteries) system. Blood supplies the nutrients we eat via the digestive systems and removes all the wastes. The human body is an amazing invention if you really think about it and blood is the biggest part of the body and even counts as a body in homicide cases where the actual body can't be found. Good luck in your classes.
560165
mainly, the heart pumps blood forward, but can be aided by the action of the muscles--they help keep blood and lymph flowing.  Additonailly, the veins have one way valves so that once the blood goes through a valve, it can't go backwards while the heart is relaxing.
894662
Well break the words down. Capillaries are closer to the surface of the skin, that is where gases exchange and where waste is disposed of. Veins are a little deeper and have more pressure on them, they are returning blood back to the heart.\nSee you have arteries, veins, and capillaries.\nThe arteries are the pipes going out of the heart, they have the most pressure on them. Because they have to deliver all the blood with the o2 in it to the capillaries all over your body. After the gas exchange at the capillary level, it then turns in to your veins, that return to the heart.
4312
Hair, once it leaves the folicle, has no blood supply.  Nails are a form of hair and have no blood supply once they leave the root.  Bone which is very dense has either a blood supply (marrow) or is bathed in nearby blood supplying needed oxygen.  Young caisson workers (building tunnels under rivers at elevated air pressure) were prone to bone embrittlement if depressurized too fast too often because expanding nitrogen from their denser bone ends prevented fresh oxygen from entering thus causing bone necrosis.  Teeth have a blood supply unless you have had a root canal (0ouch!).  Parts of the eye have poor blood supply and no veins and need oxygen from the air.  The body can take in about 10% of the oxygen needed through the skin.
931657
Cardiac and skeletal muscles are both highly organized and contract in a single direction, uniformly. Smooth muscle, on the other hand is much more loosely organized. This probably leads to confusion about the order of contraction, etc.
1008428
Veins carry deoxygenated blood from the organs and tissues back to the heart.\nDeoxygenated blood from the body enters the right atrium through two great veins, the superior vena cava which drains the upper part of the body and the inferior vena cava that drains the lower part which drains the portal cyrculation too full with nutrients to nourish the body.
295157
the major parts of circulatory system are heart and blood vessels.\nthe blood vessels are of three types-1. arteries \n2. veins\n3. capillaries\nthe arteries carry blood mainly oxygenated blood from heart to different parts of the body.\nthe veins carry deoxygenated blood from all parts of the body to heart.\ncapillaries connect the arteries and veins...they are thin walled and allow the exchange of gases to occur across their walls.
667354
The Cardiovascular System\n\n\n The cardiovascular system and the lymphatic system form what is collectively called the circulatory system. Together, these systems transport oxygen, nutrients, cell wastes, hormones, and many other substances to and from all cells in the body. The trillions of cells in the human body take up nutrients and excrete wastes every minute of every day. Although the pace of this exchange may increase with activity or slow with rest, it happens continuously. If it stops, so does life. Of the two systems, the cardiovascular system is the primary transport operator; the lymphatic system aids it in its function.\n\n\nDesign: Parts of the Cardiovascular System\n\nCardiovascular comes from the Greek word cardia, meaning "heart," and the Latin vasculum, meaning "small vessel." The basic components of the cardiovascular system are the heart, the blood vessels, and the blood. The system can be compared to a large muscular pump (the heart) that sends a fluid (blood) through a series of large and small tubes (blood vessels). As blood circulates through the increasingly intricate system of vessels, it picks up oxygen from the lungs, nutrients from the small intestine, and .....
560918
The blood vessels fill up
19594
When they lose the elasticity and their diameter is narrowed the blood flow to the organs dimnished.  So the tissue in the organs do not get proper blood supply.  High BP, Myocardial infarction ( heart atack), Stroke (Hemiplegia),etc  are the result.
572827
Its like gas for a car. Blood is a oxygen carrier, and supports all the body organs. If anyone loses too much of it- too bad!