The smooth muscle cells of the produce peristalsis to assist in the physical breakdown of foodstuff and to propel foodstuff from one portion of the tract to the next.

1. loamy sand is about 80% sand with 10% clay and defined mostly by sand particles with some clay to provide structure and fertility. the sand particles are easily visible and the soil holds structure but breaks apart easily.

2. scott sand can improve his soil quality by incorporating more silt and organic matter into the soil. peat moss and organic matter can also be incorporated.

b brown mice / white sand dunes