Circulatory System

By: Christine O'Brien

Circulatory System

The circulatory system is located in the entire body.

Function of Organs and Body System

  • Heart - the heart forces blood through tubes or blood vessels and it carries life giving oxygen to all the cells. It is located in the central left side of the chest.
  • Lungs - the lungs help the human body breathe. They are located on either side of the chest/thorax.
  • Blood Vessels - the blood vessels carry blood to each organ in the body. They are located every where in the body.
  • Blood - blood supplies essential substances and nutrients, such as sugar, oxygen, and hormones. It is located everywhere in our body also.

Function of Body System

The circulatory system provides blood flow to all the other organs. It also allows us to breathe regularly so we don't die. The blood supplies substances and nutrients, such as sugar so we can keep our blood sugar stable, oxygen so we can breathe, and hormones so our bodies can grow. The veins carry blood every where in our body so it can function properly.


The heart is located in the central left side of the chest. It's main function is to force blood through tubes or blood vessels. It carries life giving oxygen to almost all of the cells so the body can function. It is made up of almost all muscle. The parts in the heart are a superior vena cava, pulmonary artery, a right and left atrium, tricuspid, and mitral valves, right and left ventricles, septum, inferior vena cava, a arota, and muscle tissue.

The heart is a very important organ in the human body so this how the heart pumps blood. "It is very critical that "fresh" or oxygenated blood is kept separated from "stale" or deoxygenated blood that had already been moved around the whole body. This happens when the atrium contracts very gently, squeezing the blood through a one- way valve into the right ventricle. From their, the right ventricle contracts powerfully, pumping the blood along the arteries to the lung , where oxygen is replenished and CO2 is remove. Next, the "fresh" blood returns from the lungs to the left atrium and is pumped through another valve called the left ventricle. This forces blood all around the body. To summarize it, the blood circulation passes to the heart, lungs, and then back to the heart."

Diseases of the Circulatory System

  • Arteriosclerosis - This is a common disease that occurs when the fatty deposits in the arteries cause the walls to stiffen and thicken. This can restrict blood which can cause a heart attack or a stroke. Some other things that can restrict blood flow are diabetes, high cholesterol, smoking, and high blood pressure.
  • Hypertension - Commonly called high blood pressure. This common disease causes the heart to work harder which can lead to complications such as a heart attack, a stroke, or kidney failure.
  • Peripheral Arterial Disease (PAD) - This very common disease involves narrowing and blockage within in an artery.
  • Peripheral Vascular Disease (PVD) - This most common PVD occurs when the arteries and veins stiffen from the buildup of plaque. Treatments for this condition include aspirin and/or statin drugs (drugs that lower your cholesterol).

Some of the Symptoms Include:

  • Pain with movement
  • Tingling, burning, or numbness in feet when resting
  • Fatigue (felling tired/exhausted)
  • Achiness
  • Pain and cramps at night

No, person could live with out any part of my organ system because every organ is very important.

Interaction with Other Organ Systems

The organ system interacts with another organ systems because each vein helps blood flow through the body, and the heart helps the blood pump and make every other organ in the body work, and the lungs help us breathe.
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