Question 1

how does the circulatory system work?

Accepted Answer

Heart diseas: You ask a question far too involved for the space here. Look up circulatory physiology on a search engine. On the simplest level, the heart pumps blood around the body. Many systems control how fast, what blood pressure and a myriad of other factors.

Question 2

why does the body need a circulatory system?

Accepted Answer

Easy.: Circulatory system is essential to move nutrients and oxygen to cells and to remove waste. Having a transport system allows cells to specialize. If there were no circulation every cell would have to perform many more functions independently.

Question 3

which ailments of the circulatory system are most common?

Accepted Answer

Here is the list: High blood pressure(hypertension)
atherosclerosis(hardening of the arteries). This can lead to heart attack(coronary artery occlusion), stroke or peripheral vascular disease(may cause gangrene from poor circulation in the legs). Vascular occlusions can also occur due to blood clots inside the diseased arteries and or inside the  veins(venous thrombosis which can lead to pulmonary embolism( lungs).

Question 4

how does angina affects the circulatory system?

Accepted Answer

Other way around: Angina is caused by problems in your circulatory system. It does not cause them. Here's a good read on Angina: http://www.mayoclinic.org/diseases-conditions/angina/basics/causes/CON-20031194
Talk w/ your doctor to best manage this condition. It can make all the difference! Best regards.

Question 5

how does caffeine affect the circulatory system?

Accepted Answer

Caffeine circulation: Great discussion at wikipedia. Ever heard of it? Give it a try. The effects are very complex and I have studied them. Cannot give adequate detail in 400 characters.

Question 6

how can a heart puncture affect the circulatory system?

Accepted Answer

Puncture: Puncture as in gunshot wound or stabbing? It can cause circulatory collapse almost instantaneously.

Question 7

how does the skeletal system affect the circulatory system?

Accepted Answer

Skeletal system: The cells within your blood are produced in the bone marrow within your bones.  This includes red cells (RBCs), white cells (WBCs) and platelets.  You couldn't have one system without the other.

Question 8

what is the function of the lungs in the circulatory system?

Accepted Answer

Oygenation: The short answer is that the lungs oxygenate the venous blood.

Question 9

how is the circulatory system affected by tobacco and alcohol?

Accepted Answer

Nicotine addiction: Nicotine is a powerful vasoconstrictor. For each cigarette smoked the arteries constrict for about an hour with the result of 50% reduction in blood flow. Nicotine shuts down your circulation. Many with nicotine addiction like its calming effect, which long term leads to ischemic complications like stroke, heart attack, limb loss and sudden death. Hope you can quit. Small amounts red wine okay.

Question 10

how does the respiratory system depend on the circulatory system?

Accepted Answer

Inter-dependent: relationship exists between the two. The heart pumps arterial  blood to the circulation. The deoxygenated or venous blood returns to the lung where blood is oxygenated. Then blood flows into the heart chambers and the cycle continues on.

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