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Joshua Ziel, Undergraduate Student, Literature, Science & the Arts
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| The interior of the mammalian small intestine has a convoluted surface (red) to efficiently absorb nutrients as food passes through the gut tube. This is a picture of a mouse embryonic intestine at a time when these convolutions are just forming. All of the cells are stained with a blue dye that marks cell nuclei. The outer layer of blue cells will develop into muscles. Coordinated contraction of these muscles is called peristalsis and is the force that moves the food along the gastrointestinal tract. |
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