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.
The bladder is an organ about the shape of a walnut (when healthy) that is responsible for holding and removing of urea (urine).
The heart pumps blood through the rest of the body.
Transitional epithelium tissue is found in stretchy organs like the urinary bladder. This tissue is designed to stretch and recoil as the organ expands and contracts, allowing for flexibility and barrier function.
When a muscle contracts, it shortens in length.
Organ System
heart
muscles
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.
"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!!
The diaphragm expands and contracts automatically, forcing air into and out of the lungs.
The diaphragm (pronounced - diafram).
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.
The organ that expands to inhale and contracts to exhale is the diaphragm. When you inhale, the diaphragm moves downward, increasing the thoracic cavity's volume and allowing air to flow into the lungs. During exhalation, the diaphragm relaxes and moves upward, decreasing the thoracic cavity's volume and pushing air out of the lungs. This rhythmic movement is essential for breathing.
The heart is the organ which 'pumps' the blood around the body.