The undigestible parts of food are eliminated. By breathing, people take in the oxygen they need to live. Skin protects the body from harmful substances and other organisms and from drying out. The brain gets signals from all parts of the body telling what is going on there. The brain also sends signals to parts of the body to influence what they do.
Human beings can use the memory of their past experiences to make judgments about new situations.
Many skills can be practiced until they become automatic. If the right skills are practiced, performance may improve. Human beings tend to repeat behaviors that feel good or have pleasant consequences and avoid behaviors that feel bad or have unpleasant consequences. Learning means using what one already knows to make sense out of new experiences or information, not just storing the new information in one's head. The students work with a falling-cup device to investigate response time.