Magnified hundreds of times, three of the more than 5 million villi that line the small intestine are replicated in this vinyl model depicting their essential role in digestion and nutrient absorption. One villus is shown intact. Another is sectioned to reveal its network of arterioles and venules. The remaining is sectioned to show its lymphatic vessels. The corresponding key identifies 23 numbered structures. Overall dimensions of Intesine anatomy model : 10x16x4 inches (25x41x10 cm).