Malnourished Atrophied Monkey Alien

• Normal development
Examples of atrophy as part of normal development include shrinking and involution of the thymus in early childhood, and the tonsils in adolescence.
• Muscle atrophies
Disuse atrophy of muscles (muscle atrophy) and bones, with loss of mass and strength, can occur after prolonged immobility, such as extended bedrest, or having a body part in a cast (living in darkness for the eye, bedridden for the legs etc.). This type of atrophy can usually be reversed with exercise unless severe. Astronauts in microgravity must exercise regularly to minimize atrophy of their limb muscles.