Cardiovascular diseases rank as America's number 1 killer. They claim the lives of 42.7 percent of the more than 2 million Americans who die each year. Cancer follows, killing 23.8 percent. All other causes of death account for 33.5 percent. Medical research continually seeks to reduce di...

What is high blood pressure? High blood pressure means that your heart is working harder than normal to force blood into the arteries and through the circulatory system. For an adult a blood pressure reading greater that 140 over 90 is considered as high. Normally, the pumping of the heart creates ...

Heart attacks are the leading cause of death in the United States. Everyday approximately 1,500 people die from heart attacks. Thousands more suffer crippling effects of some form, and remain disabled for the Rest of their lives. A simple definition of a heart attack is a sudden Failure of the hear...

Heart Attacks A heart attack is also known as Myocardial Infarction (M.I.). A heart attack occurs when the blood supply to a portion of the heart muscle is severely reduced or stopped. This happens when one of the arteries that supply blood to the heart muscle is blocked by an obstruction. This b...

The Connection Between High Blood Cholesterol & Heart Disease Cholesterol is a waxy, fat-like substance found in the body cells of humans and animals. Your body uses cholesterol to make essential body substances such as cell walls and hormones, as well as for various other functions. Cholesterol...

Heart disease is a common disease in people. Its a disease that affects the heart and the cardiovascular system. There are many types of Heart disease. Most often when people think of any kind of heart disease they usually think of the Coronary Artery Disease. That is the narrowing of arteries that ...

One out of the four of you in this classroom will have it. It affects 50 million Americans and nearly half are women. There are no symptoms to this disease. Many people have it for years without knowing it. This is why high blood pressure is also called the "silent killer." Uncontrol...

Abstract Sickle cell anemia is a group of inherited red blood cell disorders. Normal red blood cells are round like doughnuts, and they move through small tubes in the body to deliver oxygen. Sickle red blood cells become hard, sticky and shaped like sickles used to cut wheat. When these hard and po...

Unit 2 Biology- FUNCTIONING ORGANISMS SAC- 'Essay on transport systems' "Transport systems play an essential role in the survival of flowering plants and mammals" Transport systems play an essential role in the survival of flowering plants and mammals. These organisms re...

EXPLORATION AND DISSECTION OF A MAMMALIAN HEART Abstract: In this experiment, we obtained a fresh heart and dissected it to examine and observe the different parts of the heart, as well as studying how they function and work together. Problem: How can we study the heart through dissectio...

Smoking is bad for your body and your overall health. There are many side affects that can hurt and even kill your body. It also can harm your lungs and make it hard for you to breathe. When you look at the statistics I don't understand why people do smoke. Cigarette smoking is the most...

Circulatory system, cardiac location and structures, the heart is the driving force of the circulatory system, contracting about 70 times/minute to pump an adequate volume of blood with sufficient pressure to perfuse all body organs. The muscular organ weights from 300 to 400g, it's located wit...

Sickle cell anemia is a chronic disease in which the red blood cells loose their disc-shape and become crescent. As a result of this change in shape, they function abnormally and break down, causing reoccurring painful episodes. An abnormal type of hemoglobin called "hemoglobin S" causes...

Cholesterol is a waxy, fatty substance that circulates through the bloodstream as part of the cell membrane. Unable to dissolve in blood, it is transported by lipoproteins to and from the liver through the circulatory system. Found throughout all human bodies, it is an integral part of life, ...

Imagine the air that you and your children breathe is being polluted with hundreds of chemicals and toxic substances, but if you smoke you don't have to imagine. With each cigarette you smoke you are polluting your lungs and the air around you with over four thousand chemical compounds and over...

Know the Facts About Hypertension Hypertension is the increase of blood pressure above normal levels over an extended period of time. Anyone with a regular blood pressure reading greater than or equal to 140/90 mmHg is considered to have hypertension. Those with a blood pressure of 120/80 mmH...

In the circulatory system of the human body, there are about 5-6 quarts of blood in the average adult. This blood is considered a tissue because it has many cells. The blood goes to all the parts of the body taking oxygen from the lungs and carbon dioxide to the lungs, while also transporting metabo...

HYPERTENSION Hypertension is a common disorder characterized by a sustained elevation of systolic arterial pressure (top number) of 140 mm Hg or higher, or a diastolic arterial pressure (bottom number) of 90 mm Hg or greater, or both. Hypertension is divided into two categories: essential (o...

Stroke When a family member has a stroke, the family could also be highly affected. The person may have slurred speech, facial weakness, loss of bladder control, difficulty in breathing and swallowing, and paralysis or weakness, particularly on one side of the body. A stroke is also referre...

Tobacco products kill more than 400,000 people in the United States a year. That is more than the number deaths from homicides, fires, AIDS, alcohol, car accidents, suicides, and illegal drugs put together. It is by far the number one cause of preventable death in the United States. Action should ...

I'd like to take you back to July 26, 2003. It was an average morning for me; I was lifting weights in a class at the gym when I was suddenly confronted with a blinding, uncontrollable migraine that came on without warning. The pain was unbearable and nauseating, so I got out of class to lay on a c...

It seems like everyone is always talking about food, 'Junk' food and 'healthy' food, and what you should and shouldn't eat. But it is really important. Healthy eating can make you look different and feel different. And even small changes in the way you eat can make a difference. A good balanced die...

What is Lung Cancer? The lungs are two sponge-like organs found in the chest cavity. The right lung has three sections, called lobes. The left lung has two lobes. It is smaller because the heart takes up more room on that side of the body. The lungs bring air in and out, taking in oxygen and gettin...

How the nervous system works The nervous system is the control system and the network of communication for the body. All of our thoughts, and behavior can be traced to the activity of a neuron. A typical neuron has three important parts: first a cell body, second dendrites and last an axon. All...

The discovery of aspirin dates back to the 5th century B.C., when Hippocrates used a powder from the bark of a willow tree to ease minor pains, reduce fevers and to help with childbirth. The willow tree powder was actually salicin, the pharmacological ancestor to the family of drugs known as salicy...