In regards to the Digestive System, describe each of the major anatomical structures of the digestive tract, beginning at the mouth. Be sure to explain the role each structure plays in the digestive process.

A food particle from your breakfast takes a circuitous path through your digestive system. Suppose its motion over a period of time can be represented by the four displacement vectors depicted in the figure below. Let the vectors have magnitudes A = 7.8 cm, B = 17 cm, C = 22 cm, and D = 5.7 cm.

Part A: What is the magnitude of the total displacement of the food particle?

Part B: What is the direction of the total displacement of the food particle?

Part C: If the average speed of the particle is 0.010 mm/s, what is the magnitude of its average velocity over the time interval of the four displacements?