How to learn about the human body online
Just when it seemed impossible to teach anything else online human anatomy courses are now available online! High school and college courses are available through several educational institutions. Students can choose an overview course on human anatomy or can study specific human anatomy systems such...
How the human body responds to fear
By: W. Diane Van Zwol
Humans respond to fear in many different ways, summarized under three categories, fight, flight and paralysis. Normally, fear serves as a protective mechanism for the human body. This is healthy and beneficial. For example, you approach a fire and are fearful of it, because you...
The origins of the sensations of itch and pain
By: Patrick Sills
Have you ever grabbed a hot pizza out of the oven and forgotten to use hand mitts? If not, have you ever stubbed your big toe on that coffee table leg or hit your knuckle against a steel beam underneath your car as you loosen...
Structure and function of the thyroid
By: Mindy Horton
The thyroid gland is located under the larynx in the neck and is the largest of all the endocrine glands. It has two wings (or lobes) joined by tissue called the isthmus that are wrapped around the trachea. The parathyroid glands are right behind the...
The causes of color blindness
By: Marsha Bergeron
How many people have seen someone (usually a man) and thought to yourself “Oh my goodness did he get dressed in the dark this morning?” Not everyone you see garishly dressed is doing it for effect or simply has no fashion sense, many...
By: Jose Juan Gutierrez
The skeletal system is composed of all the bones found in the body, including the joints that connect the skeletal system. The skeletal system protects all the internal organs of the body and provides a framework that permits the body to stand up and move...
Function and structure of the amygdala in humans
By: Dr. Bryan Katz
The term amygdala refers to a bilateral cluster of nuclei located deep in the brain's temporal lobes. The word amygdala itself is derived from the Greek word for almond. Apparently, the shape of these neuronal clusters vaguely resembles an almond, at least in the eyes...
What is bilateral symmetry?
By: Raven Carluk
Bilateral symmetry defines a characteristic people see every day, but never think about. Evolution almost demands that advanced, free-moving animals express this type of symmetry. Merriam-Webster gives this definition: symmetry in which similar anatomical parts are arranged on opposite sides of a median axis so...
Role of the NMDA receptor in brain injury
By: Maffew James
Brain injury is a common problem in accidents involving trauma to a person's head, and as the brain controls the whole body, this can cause catastrophic effects on bodily function and condition. Science is still in the dark when it comes to preventing this damage...
The science behind cutis anserina
By: Maffew James
Whether you are exposed to a chilling wind, swept up in the passion of a ballad, or suffering a fright, a common phenomenon is that of cutis anserina. This is the medical term for a common physiological occurrence known as goose bumps, which involves the...
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