BIOL 1082 Lecture Notes - Lecture 16: Blastoderm, Cell Membrane, Body Plan
Document Summary
Animal development 2 (reading: concepts: 47. 2-47. 3 in textbook: describe the tissues and organs that originate from each of the three embryonic germ layers. Ectoderm: epidermis of skin, nervous system, sense organs; comes from animal pole. Mesoderm: skeleton, muscles, blood vessels, heart, blood, gonads, kidneys, dermis of skin; comes from vegetal pole. Endoderm: lining of digestive and respiratory tracts, liver, pancreas, thymus, thyroid; comes from vegetal pole: define organogenesis, diagramming neurulation in a frog embryo. During organogenesis, regions of the three embryonic germ layers develop into the rudiments of organs. **diagram of neurulation in notes*: describe how cell movement and apoptosis are involved in animal development. Movement: although organogenesis requires local cellular interactions and activities, some cells undergo long-range migration. Two sets of cells that develop near the neural tube of vertebrae embryos migrate in the body before assuming their developmental fate.
