Which anatomical term means toward the midline of the body

If the singular term ends in -us, the plural is usually formed by changing the ending to

Waste is deposited into in thin layers which are then compacted and covered with soil.

If mary has stopped her resistance training for three weeks, once she continues, she should work out harder to get back in shape keep her workout the same as before her break reduce the weight during the workout session reduce the rest times between sets