'Microscopic shaggy hairs called villi line the walls of this digestive organ'
the small intestine
THE BODY HUMAN: Microscopic shaggy hairs called villi line the walls of this digestive organ
Microscopic shaggy hairs called villi line the walls of this digestive organ
Microscopic shaggy hairs called villi line the walls of this digestive organ
THE BODY HUMAN
the small intestine
THE BODY HUMAN