DNA by Israel Rosenfield

Author:Israel Rosenfield
Language: eng
Format: epub
Tags: Science/Life Sciences/Biology/General
Publisher: Columbia University Press
Published: 2011-09-15T04:00:00+00:00

Other exploratory processes are important for the embryonic development of the vascular and nervous systems, and the guiding principles are similar to those of ant foraging: just as the ants randomly explore the terrain around their nest, capillary vessels sprout off the larger blood vessels and randomly explore the surrounding tissues for the signals coming from oxygen-deprived cells. And just as contact with food makes the ant reinforce the path that led to the food, the sprouting capillary vessels establish permanent contacts whenever they encounter tissue with oxygen-deprived cells. Similarly, fine nerve endings grow randomly, establishing stable nerve-muscle connections whenever they receive electrical and chemical signals coming from muscle.

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