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ADHD
Attention deficit hyperactivity disorder, or ADHD, is a common neurobehavioral problem that affects children as well as some adults.
Some research suggests that the cause of ADHD ...
AIDS
White blood cells, which are produced in the bones, are a major component of the body's immune system. When an infectious organism such as a virus or bacteria enters the body, the ...
ALS
All voluntary movement in the body is controlled by the brain. Nerve cells in the brain, called upper motor neurons, initiate movement through the release of chemical signals call...
Abdominal Aneurysm
The aorta is the main artery of the circulatory system. Its function is to carry oxygen-rich blood from the heart to the rest of the body. It is divided into two main sections; the...
Abduction and Adduction of the Arm
Abduction is movement away from the midline of the body while adduction is movement towards the midline of the body. An example of this movement is swinging the upper limb to the s...
Abnormal Hemostasis: Embolus Causes a Stroke
The vertebral arteries are two major arteries supplying the brain. They pass through small openings in the cervical vertebrae called the transverse foramen. If the vertebral artery...
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