Human Anatomy

Anatomy of the testes
Sweating (perspiration)
Urinary tract
3 weeks pregnant: The beginning of human development

Anatomy of the shoulder (glenohumeral joint/scapulo-thoracic joint)

The shoulder comprises bones, ligaments, tendons and muscles that connect the arms to the torso. The shoulder has two joints that work together to allow arm movement.

Sleep physiology

What happens when we sleep? Sleep is a state of reduced awareness and responsiveness. In humans, sleep is also associated with reduced movement. Sleep consists of two different phases: rapid eye movement (REM) sleep and non-REM or slow wave sleep.