NSES Content Standard C 
Life Science: The characteristics of organisms  
Grades K-4, page 129  

The behavior of individual organisms is influenced by internal cues (such as hunger) and by external cues (such as a change in the environment). Humans and other organisms have senses that help them detect internal and external cues. 

Benchmark 6C The Human Organism: Basic Functions
Grades K-2, page 136
Senses can warn individuals about danger; muscles help them to fight, hide, or get out of danger.

Benchmark 6C The Human Organism: Basic Functions
Grades 3-5, page 136
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.

Benchmark 6D The Human Organism: Learning
Grades K-2, page 140
People use their senses to find out about their surroundings and themselves. Different senses give different information. Sometimes a person can get different information about the same thing by moving closer to it or further away from it.