Muscles can either be under voluntary control, meaning you can continuously contract or relax them, or be under involuntary control, meaning their contractions happen without you thinking about it.

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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.