chap 15 notes

chap 15 notes - Chapter 15 Cell Lineages p 370 Heart...

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Chapter 15 Cell Lineages p 370 Heart Formation in Birds and Mammals (Fig 50-12) KEY CONCEPTS * Gastrulation establishes ectoderm, mesoderm, and endoderm; each gives rise to specific types of tissues Learning Objective 9 * Trace the early development of the vertebrate nervous system Early Vertebrate Nervous System Development * Developing notochord is responsible for induction (Ch 17) * This is the process where certain cells stimulate the differentiation of their neighbors * causes ectoderm to differentiate and form central nervous system * Brain and spinal cord develop from the neural tube * The anterior portion develops into brain; the rest into the spinal cord. Both remain hollow Human Nervous System Development (Fig 50-11) Growth of Digestive Tract * Digestive tract formed as body wall grows and folds: * Two tubes lined with endoderm, grow and become elongated * Trachea grows downwards * Develops into paired lungs * The pharyngeal pouches bud laterally *
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chap 15 notes - Chapter 15 Cell Lineages p 370 Heart...

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