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...
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...
Function and importance of the association cortex
By: Jael Ravalyn
This is the part of the brain usually being referred to! Brain power is a nice catch phrase referring to the amazing ability to coordinate input and control to produce fluid action. These notable aspects of the brain's power are orchestrated by the association cortex...
Bad breath: Causes and prevention
By: Ahmad Sadli
Bad breath is scientifically known as halitosis. The symptoms of bad breath should be easily detected or simply observed when a person exhales or speaks.Now what actually causes bad breath?Poor oral hygiene is the main factor that causes halitosis.The food we eat...
Understanding skin, its roles and functions
By: Natalie Louise Fox
Human skin is incredible. It is the body's largest organ, covering just about every nook and cranny of our entire body. The skin has many functions, it is made up of many different parts and also has the amazing ability to regenerate and heal itself...
Scientists identify a role for bone in male fertility
By: Alicia M Prater PhD
Sex steroids, or androgens, in men have well known functions in reproduction and fertility, specifically the ‘male’ hormone testosterone. A lesser known function is the effect of testosterone and other steroid hormones on the development of the skeleton. In the March 4, 2011, issue...
10 unusual facts about the human body
By: Sandra Piddock
The human body is a miraculous machine. With around 206 bones and 650 muscles, and a heart which is around the size of a grapefruit, the body keeps people moving, breathing and functioning with little or no outside help. That in itself is something of...
The role of hormones in the human body
By: Sue Rebecca
For the proper growth and development of the human body, for the regulation of energy levels and other vital body functions, and for the ability to produce offspring in male and female, as well as for the maintenance of various metabolic processes in the body...
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