Proteins provides the building blocks for recovery and repair in forming new muscle
In much of a digestive tract such as the human gastrointestinal tract, smooth muscle tissue contracts in sequence to produce a peristaltic wave, which propels a ball of food (called a bolus while in the esophagus and upper gastrointestinal tract and chyme in the stomach) along the tract.
RNA nucleotides have a uracil base instead of thymine.
Their is no picture, but we definitely need oxygen, water and nutrients.