Diseases Relating to Myelin Sheath

Nerve cells send signals along long wires called axons, which are insulated with a fatty substance called myelin. The myelin sheath allows signals to be transmitted rapidly from the nervous system to the rest of the body. When myelin is destroyed -- called demyelination -- nerve signals are slowed or stopped.

Dr. Colleen Doherty
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Definitions of Anatomy & Physiology

At colleges and universities, anatomy and physiology are often combined into one course. This is because they are branches of the study of biology that are closely related.

Angus Kerkhoff
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Stretches for Middle Back Pain

Pain can develop in several parts of the back, including the middle region. If muscle tightness and joint stiffness are contributing to mid-back pain, stretching this area can help. Stiffness often settles into the mid-back due to poor posture and aging.

Erin Saether
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Side Effects of Facial Fillers

As you age, your skin loses some of its natural elasticity. The result is fine lines and wrinkles that gradually deepen over time. Fortunately, you don’t have to go under to knife to reduce the appearance of aging.

Ciele Edwards
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What Does Ginseng Do to My Body Parts?

Ginseng is a herb that originated in northern China more than 5,000 years ago. Medicinal use of the herb began over 3,000 years ago. Its use spread to North America among Native American tribes who used ginseng for its healing abilities. Ginseng’s many reputed health benefits are derived from the root.

Connie Peete
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What Causes Rough Patches on Knees?

Rough, dark patches of skin on the knees are not unusual. Your knees bear the brunt of many physical activities. Children learning to crawl are very hard on their knees, as are the parents who kneel on the floor to interact with them at eye level. Generally speaking, rough patches of skin indicate dryness.

Erica Roth
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How Are Protein & Nucleic Acids Related?

Proteins are important structural and functional biomolecules that are a major part of every cell in your body. There are 2 nucleic acids -- DNA and RNA. Your cells make proteins by following the instructions encoded in your DNA, which is genetic material and a type of nucleic acid.

Kirstin Hendrickson
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The Advantages of a Long Arm Span in Athletics

Different body types are better suited to certain sports and physical activity. For example, the requirements of basketball tend to exclude extremely short players from advancing to the professional leagues.

Danielle Hill
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What Are the Organs of the Cardiovascular System?

Your cardiovascular system is made up of the heart, blood vessels and blood. It is a system that never rests. It pumps 5 to 6 liters of blood per minute through your body and can pump as many as 30 liters per minute during times of extreme stress.

Sunny de Fortuna Rovescio
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What Are the Functions of Simple Squamous Epithelial Cells?

Simple squamous epithelium refers to a single layer of thin, flat cells that line body surfaces. One side of the surface opens to the environment while the other is anchored to the underlying cells.

Leann Mikesh, Ph.D.
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Coffee & Gum Disease

When it comes to dental health, taking care of your fleshy, pink gums is every bit as important as brushing your pearly whites. Gum disease, also known as periodontal disease, is an inflammation of the tissue surrounding and supporting the teeth.

Carolyn Robbins
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Cycling vs. Elliptical for Damaged Knees

It’s rare to talk about therapy for your knees without discussing the low-impact benefits of cycling and elliptical workouts. Both are forms of exercise for knee injuries because keeping your knees mobile and strong can minimize further damage.

Erin Saether
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