関連ワード:
what is the involuntary muscle movement in the digestive system what is the involuntary muscle action of the digestive system called what is the involuntary muscle movement that continues throughout the digestive system what is the involuntary muscle movement that moves food through the digestive system what is the involuntary rhythmic muscular movement that moves food through the digestive system what is the involuntary contraction and relaxation of muscles in the digestive system called what is the name for involuntary muscle contractions that push food along in the digestive system
