An organ is a group of tissues that work together to perform a specific task in the body, such as digesting nutrients or producing chemical messengers that enable brain cells to communicate. Although ...

The left atrium is one of the four chambers of the heart, located on the left posterior side. Its primary roles are to act as a holding chamber for blood returning from the lungs and to act as a pump ...

In the theater of the brain, nerve cells have long been cast as the stars, bringing mental scenes to life with their electrical and chemical performances. Yet many of the cellular actors in the human ...