Documents The Muscular System Muscles contribute to the outward appearance of animals and are essential for...

The Muscular System Muscles contribute to the outward appearance of animals and are essential for movement, posture, breathing, circulation, digestion, and many other functions…

Documents The Nervous and Endocrine Systems…Communication….

The Nervous and Endocrine Systemsâ¦Communication⦠The Nervous System How do we know when to eat? How do we know if we are touching a hot stove? How does our body control…