Man's origins in Africa: Implications of Evolution theories
By: Robert Taylor - 209964
The Tishkoff Study Confirms the Centrality of Africa in All People The recently released groundbreaking genetic study by Sarah Tishkoff and her team of African, American and European researchers confirms and/or establishes three essential things about Africans, African-Americans and their evolutionary relationships with the...
Prostate cancer surgery and the importance of early diagnosis
By: Nicole Evans M.D.
Approximately 1 in 6 men older than 50 years of age will develop prostate cancer. The ability to provide an early diagnosis of prostate cancer has drastically improved since the implementation of prostate cancer screening in the United States. However, it is not clear whether...
How smoking impacts the human circulatory system
By: Lisa Stephens
Most people know that smoking is bad for you and that it can cause cancer, but are you aware that smoking also creates serious effects within your circulatory system - the heart, arteries and veins that carry blood throughout your body? Not only should we...
How the human heart works
By: Effie Moore Salem
The human heart pumps blood out to all parts of the body. You could say it is the engine of the body. Without it, there would be no blood circulating. The beating of the heart is heart muscle contracting and relaxing to send fresh...
The role of the placenta in fetal circulation
By: Trenna Sue Hiler
The placenta is the organ that attaches the mother and the baby in the womb. It is essentially the unborn baby's life support system. It forms from the same cells as the embryo and attaches itself to the wall of the uterus. Understanding how the...
An overview of pulmonary circulation
By: Perry McCarney
The pulmonary circuit takes deoxygenated blood, containing little oxygen and large amounts of carbon dioxide, from the heart to the lungs. At the lungs, carbon dioxide moves from the blood into the air in the lungs and oxygen from within the lungs moves into...
How the human heart works
By: Cynthia Wall
It circulates the body's blood more than 1,000 times a day. It pumps 5,000 to 5,000 quarts of blood per day through 60,000 miles of blood vessels. All of this from a muscular organ the size of your fist The Human...
The importance of capillaries for circulation
By: Caroline Fynn
The capillaries are the smallest of the blood vessels within the human body. They measure approximately 7 microns in diameter and form a capillary network that links arteries and veins. Arteries transport blood away from the heart and veins carry blood towards the heart. Substances...
A look at how CPR restarts the circulatory system
By: Lisa Stephens
Cardio-pulmonary resuscitation (CPR) is a valuable and often life-saving procedure that is performed when a person's heart or breathing has stopped. There are many reasons that a person may need CPR including accidents, such as prolonged choking where the airway is obstructed, trauma or drowning...
How Streptococcal species are classified
By: Tami Port MS
Streptococcus is a group of Gram-positive cocci-shaped bacteria that occur in strips, or chains of cells. Understanding the classification of members of this genus can be tricky. There are many different traits used to distinguish one from another, and some of these traits are shared...

 

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