muscles
When you inhale, the diaphragm contracts and moves downward. This movement creates more space in the chest cavity, allowing the lungs to expand and fill with air.
heart
muscles
Smooth muscles
Typically that organ is your heart. It contracts and relaxes 72 times per minute, day and night, till your death. That means for hundred years.
Muscles contract. The other organs that contract rely on the action of voluntary or involuntary muscle tissue. These include hollow, peristaltic organs like the intestine or ureter, as well as blood vessels. The uterus is also a muscle that contracts during labor.
"When smooth muscle contracts, the cavity of an organ alternately becomes smaller or enlarges so that substances are propelled through the organ along a specific pathway"Smooth muscle
The diaphram!!
what is the organ of movement in snake
The diaphragm expands and contracts automatically, forcing air into and out of the lungs.
The muscles.
Flexion