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Blood Flow through the Human Heart

By: HWC, Views: 7489

The heart is the pump of the human circulatory system. The left side of the heart has two connected chambers, the left atrium and the left ventricle. The right side of the heart also has two connected chambers, the right atrium and the right ventricle. These two sides, or pumps, of the heart are ...

Introduction to Macular Degeneration

By: Administrator, Views: 10596

Macular degeneration An incurable, age-related, progressive eye disease that affects more than 10 million Americans. Leading cause of blindness for those ages 55 and older. Macular degeneration For the first time, researchers have linked gene defects to macular degeneration. Could lead to ...

Alzheimer's Disease

By: Administrator, Views: 10885

Alzheimer's disease (AD), also referred to simply as Alzheimer's, is a chronic neurodegenerative disease that usually starts slowly and gradually worsens over time. It is the cause of 60–70% of cases of dementia. The most common early symptom is difficulty in remembering recent events. As the d...

Inflammation

By: Administrator, Views: 11020

Inflammation is part of the body's immune response. Infections, wounds, and any damage to tissue would not be able to heal without an inflammatory response. Chronic inflammation can eventually cause several diseases and conditions, including some cancers and rheumatoid arthritis.

Gas exchange - partial pressure, locations, external and internal respiration

By: HWC, Views: 7882

▪ In a mixture, each individual gas exerts a pressure that is proportional to the concentration of that gas within the mixture. • This part of the total pressure is called a "partial pressure". • A gas moves along the part of the pressure gradient determined by its own concentration. ...

How a Urinalysis is Performed

By: Administrator, Views: 10907

A urinalysis is a test of your urine. A urinalysis is used to detect and manage a wide range of disorders, such as urinary tract infections, kidney disease and diabetes. A urinalysis involves checking the appearance, concentration and content of urine. Abnormal urinalysis results may point to ...

Gastroesophageal Reflux Disease (GERD)

By: Administrator, Views: 10691

Gastroesophageal reflux disease, or GERD, is a digestive disorder that affects the lower esophageal sphincter (LES), the ring of muscle between the esophagus and stomach. Many people, including pregnant women, suffer from heartburn or acid indigestion caused by GERD.

Gas exchange - driving force

By: HWC, Views: 7793

• The respiratory system is responsible for the movement of gases involved in cellular metabolism. • Oxygen is used up and carbon dioxide is generated during the aerobic breakdown of glucose and other fuel molecules in order to produce ATP. • Three important continuous physiological pro...

Methods of carbon dioxide transport - carbaminohemoglobin and bicarbonate ions

By: HWC, Views: 7779

• Carbon dioxide is transported three ways: • As bicarbonate ions in the plasma. • Bound to hemoglobin. • As a dissolved gas in the plasma. • A small percent of carbon dioxide is transported as a dissolved gas. • Some of the carbon dioxide is bound to hemoglobin, in the fo...