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Encyclopedia: Erection
The erection of the penis, clitoris or a nipple is its enlarged and firm state. It depends on a complex interaction of psychological, neural, vascular and endocrine factors. The ability to maintain the erectile state is key to the reproductive system and many forms of life could not reproduce in a natural way without this ability. A penis erection occurs when two tubular structures that run the length of the...
Stretching Muscles Slide Show
How to stretch major muscle groups
Stretching should be a key part of your exercise program. Stretching before your workout — especially if you have tight or injured muscles — can prepare your body for exercise. Stretching after your workout promotes better range of motion of your joints. Stretching also improves your flexibility, balance and coordination. This slide show from the Mayo Clinic will show you how to stretch your major muscle groups.
Basic Stretches Slide Show
Stretching is an essential part of exercise; learn the basics with this helpful slide show.
Female Breast Anatomy Slide Show
The anatomy of the human female breast contains various tissues and structures. One of the primary functions of the breast is milk production. Learn about breast ducts, muscles, and blood vessels in this slide show from the Mayo Clinic.
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