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Z 362 Lab 2
Important terms from Lab 2 for the midterm
| Term | Definition |
|---|---|
| Magnification | The process of englarging something only in appearance, not in physical size |
| Resolution | Shortest distance between two points on a specimen that can still be distinguished by the observer or camera system as separate entities |
| Field of View | Extent of the observable image that is captured or seen at any given moment |
| Depth of View/Field | Distance between the nearest and farthest objects in a scene that appear acceptably shart in an image |
| Collar | Network of microvilli strands that catch food particles |
| Flagellum | Long strand that creates a feeding current that funnels food particles to the collar |
| Choanocyte | Specialized, flagellated collar feeding cells in sponges |
| Pinacocyte | Flattened cells that form outer layer of sponges |
| Spongocoel | Inner cavity of sponge |
| Porocyte | Cells that form water channels |
| Ostia | Incurrent pores |
| Mesohyl | Gelatinous layer in between endoderm and ectoderm |
| Archaeocyte | Ameboid, totipotent cells that perform a variety of functions including reproduction |
| Primmorphs | Stage of sponge development in which a new one has reaggregated |
| Germ Layer | Cells that give rise to distinct tissues and/or organ systems in the adult |
| Diploblastic | Animals with only two distinct germ layers |
| Endoderm | Innermost layer |
| Ectoderm | Outermost layer |
| Mesoderm | Third germ layer that lies between the endoderm and ectoderm |
| Triploblastic | Animals with three distinct germ layers |
| Acoelomate | Animals that lack an internal body cavity |
| Pseudocoelomate | Animals with a fluid-filled cavity between the mesodermal layer and the endoderm of the gut |
| Coelomate | Animals that possess a true coelom (body cavity) with a mesodermal layer that lines both the body wall and the gut |
| Protostome | Animals that develop a coelom through enlargement of a split in the mesoderm |
| Deuterstome | Animals that develop a coelom from evagination of the embryonic gut into the fluid-filled cavity of the developing embryo |
| Nematocyst | Stinging organelle that entraps, ensnares, poisons, and paralyzes prey |
| Polyp | Juvenile Cnidarian's body form |
| Medusa | Adult Cnidarian's body form |
| Epidermis | Outer cell layer (ectoderm) |
| Gastrodermis | Inside cell layer (endoderm) |
| Gastrovascular Cavity | Single body cavity of a cnidarian |
| Mesoglea | Acellular jelly-like substance between the epidermis and the gastrodermis |
| Parenchyma | Mesodermal layer that develops into a loose collection of cells in Platyhelminthes |
| Radial Symmetry | Similar repeated parts radially arranged around a central body axis |
| Bilateral Symmetry | Having one line of symmetry that divides the body into equal halves |
| Cephalization | Concentration of nervous and sensory tissues at one end of the animal |
| Anterior | Toward the front |
| Posterior | Toward the rear |
Created by:
knye
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