Anatomy & Physiology


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Diane Ursu, Diane Ursu

Diane Ursu

Andy Luttrell, Andy Luttrell

Andy Luttrell

Mary Earhart at home, photo by Hannah Earhart

Mary Earhart

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Anatomy & Physiology

Umbilical Cord Function and Structure

In: Reproductive System

By: Bridget Coila

Fetal blood circulation depends on an efficient blood supply back and forth between baby and placenta. The umbilical cord performs this function in the womb. more...

The Sense of Smell

In: Nervous System

By: Andy Luttrell

The olfactory system consists of a collection of odor receptors that send a message to the brain when they detect a smell. This is just one of the chemical senses. more...

How the Ear Works

In: Nervous System

By: Andy Luttrell

The cochlea, a structure in the inner ear, changes sound waves into electrical signals that get sent to the brain. The cochlea also determines the pitch of sounds. more...

Uses for Urine

In: Anatomy & Physiology (general)

By: Mary Earhart

Urine contains antibodies, hormones, vitamins and minerals. In emergency situations urine treatment can save lives. Some drugs are made from urine and it has folk uses. more...

How Vision Works in the Brain

In: Nervous System

By: Andy Luttrell

Once light enters the eye, its message is sent to a number of brain parts. These places in the brain construct pictures and tell the body how to respond. more...

How Eyes Tell the Brain What They "See"

In: Nervous System

By: Andy Luttrell

When light enters the eye, specific neurons in the retina must respond to the information and send a message to the brain. This is a process called "phototransduction." more...

The Neurology of Pain Perception

In: Nervous System

By: Andy Luttrell

Feelings of pain are processed differently than other senses. This article explains the basic neurological processing of pain, including pain receptors and brain regions. more...