Leif Saul hangs out with a neuron

The blind spot in the human eye
Normally, the blind spot goes unnoticed, for two reasons.  First, each eye fills in the gap in ...
There’s a vas deferens between your epididymis and your ejaculatory duct
You’ve almost made it through a semester of anatomy.  Like a sperm cell, you sometimes feel like ...
Gray and white matter – the cities and highways of the brain
Your brain has around a hundred billion signaling cells called neurons, forming an astronomical ...
Capillaries do all their work in bed – they’re not lazy, but they’re leaky!
Our tiny capillaries are the most important blood vessels in the body, responsible for supplying ...