Arteries and the pulse Student activity Play

Bacterial cell walls Slideshow Play

Bacterial cell walls and Gram-staining Illustration Play

Elasticity of artery walls Slideshow Play

Intestinal walls Slideshow Play

Physical effort and circulation Whiteboard exercise Play

The force exerted by a single gas molecule against the walls of a vessel Animation Play

The force exerted by a single gas molecule against the walls of a vessel Simulation Play

The force exerted by a single gas molecule against the walls of a vessel Student activity Play

The influence of physical effort on the blood vessels Slideshow Play

The principle of construction of high walls Animation Play

The structure of xylem and vascular bundles Student activity Play

Xylem structure Slideshow Play