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BIO Chapter 3
| Term | Definition |
|---|---|
| Protoplasmic | single celled organism (archeans, bacteria, protists) |
| Asymmetry | No way to cut body exactly in half |
| Spherical | any plane passing through the exact center of the body will cut it in half |
| Radial | Bowl or vased shape organisms (cnidarians, sponges) |
| Protostome | mouth forms first |
| Coelom | place in the animal where the organs are found |
| Protostome division | spiral cleavage, new cells are smaller added towards inside of embryo |
| Deuterostome | radial cleavage, new cells are formed evenly sized added externally |
| Mosaic | Early specialization of cells, embryo is broken apart incomplete defective embryos form |
| Relative | Late specialization of cells, embryo is broken apart each continues normal development |
| Protostome Types | Lophotrochozoans, ecdysozoans |
| Sponges are | Metazoans, lack symmetry, most lack true tissues |
| Asconoid | simplest, smallest, least efficient |
| Syconoid | intermediate in size and efficiency, fold in body makes space for chanocytes |
| Leuconoid | biggest, most efficient. no central cavity, chambers of chanocytes through body, multiple opportunities to obtain food |
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