See It · The Endocrine System

Endocrine System Walkthrough

How glands use hormones in the blood to control the body, one step at a time. Go at your own pace. Nothing here is graded.

Speed

Think of it like this

Quick check

Wrong answers are fine here. Read why, then try again.

Dr. Akash Garg · See It: Anatomy & Physiology · Chapter 17, The Endocrine System (OpenStax Anatomy & Physiology 2e) · Use the left and right arrow keys to move between steps. Try it hands-on in the Endocrine Lab; calcium, PTH and calcitonin have their own Calcium Balance Simulator.
Diagrams are simplified and not to scale. Hormone particle counts, speeds and time scales are exaggerated so you can see them.