The pharyngeal arches are embryonic structures that develop into the face, neck, a part of the heart, and several endocrine glands in animals. They are thought to have played a key role in vertebrate... This description may be from another edition of this product.
ThriftBooks sells millions of used books at the lowest everyday prices. We personally assess every book's quality and offer rare, out-of-print treasures. We deliver the joy of reading in recyclable packaging with free standard shipping on US orders over $15. ThriftBooks.com. Read more. Spend less.