See It · Blood Vessels and Circulation

Blood Vessels Walkthrough

How vessels are built, how pressure moves blood, how capillaries trade fluid, how your body keeps blood pressure steady, and where blood goes. 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 20, The Cardiovascular System: Blood Vessels and Circulation (OpenStax Anatomy & Physiology 2e) · Use the left and right arrow keys to move between steps. Practice next in the Blood Vessels Lab.
Diagrams are simplified and not to scale. Cells and molecules are drawn far larger than life, the heart rate and reflex timing are sped up so you can watch them, pressure values are typical textbook numbers for a resting adult, and pressures from the tissue fluid are treated as zero in the capillary exchange step.