1 Related Resources Above-Knee Amputation Lower-limb amputation is a surgical procedure performed to remove a limb that has been damaged due to trauma or disease. 2  Find a PT Search our national database of physical therapists.
Food is moved through the pharynx and then enters the esophagus. This is the muscular tube that connects the throat to the stomach. Your esophagus is about 10 inches long, and it acts only as a passageway for food and drink. The esophagus passes behind the airway to the lungs and in front of the spinal column. It pierces the diaphragm before reaching the stomach. Food moves through your esophagus by a wavelike series of muscular contractions called peristalsis.
Smaller food is moved by the tube feet along the outer arms into the mouth located in the center on the underside of the starfish. Food is pushed by the esophagus into the stomach and digested by enzymes produced in the pyloric cecum. In the Red-Knobbed Starfish, the mouth is in actuality a sort of primary stomach.