Vocabulary from Module 11, from Apologia's High School Biology Course Exploring Creation With Biology, by Dr. Jay Wile and Marilyn F. Durnell (2nd edition). There is also a crossword puzzle with these vocabulary words at e-learninglinks.com.
Terms : Hide Images
| 61421532 | Invertebrates | Animals that lack a backbone | |
| 61421533 | Vertebrates | Animals that possess a backbone | |
| 61421534 | Spherical symmetry | An organism possesses spherical symmetry if it can be cut into two identical halves by any cut that runs through the organism's center. | |
| 61421535 | Radial symmetry | An organism possesses radial symmetry if it can be cut into two identical halves by any longitudinal cut through its center. | |
| 61421536 | Bilateral symmetry | An organism possesses bilateral symmetry if it can only be cut into two identical halves by a single longitudinal cut along its center which divides it into right and left halves. | |
| 61421537 | Epidermis | An outer layer of cells designed to provide protection | |
| 61421538 | Mesenchyme | The jellylike substance that separates the epidermis from the inner cells in a sponge | |
| 61421539 | Collar cells | Flagellated cells that push water through a sponge | |
| 61421540 | Amoebocytes | Cells that move using pseudopods and perform a variety of functions in animals | |
| 61421541 | Gemmule | A cluster of cells encased in a hard, spicule-reinforced shell | |
| 61421542 | Polyp | The sessile, tubular form of a cnidarian with a mouth and tentacles at one end and a basal disk at the other | |
| 61421543 | Medusa | A free-swimming cnidarian with a bell-shaped body and tentacles | |
| 61421544 | Epithelium | Animal tissue consisting of one or more layers of cells that have only one free surface, because the other surface adheres to a membrane or other substance | |
| 61421545 | Mesoglea | The jelly-like substance that separates the epithelial cells in a cnidarian | |
| 61421546 | Nematocysts | Small capsules that contain a toxin which is injected into prey or predators | |
| 61421547 | Testes | Organs that produce sperm | |
| 61421548 | Ovaries | Organs that produce eggs | |
| 61421549 | Anterior end | The end of an animal that contains its head | |
| 61421550 | Posterior end | The end of an animal that contains its tail | |
| 61421551 | Circulatory system | A system designed to transport food and other necessary substances throughout a creature's body | |
| 61421552 | Nervous system | A system of sensitive cells that respond to stimuli such as sound, touch, and taste | |
| 61421553 | Ganglia | Masses of nerve cell bodies | |
| 61421554 | Hermaphroditic | Possessing both the male and the female reproductive organs | |
| 61421555 | Regeneration | The ability to regrow a missing part of the body | |
| 61421556 | Mantle | A sheath of tissue that encloses the vital organs of a mollusk, secretes its shell, and performs respiration | |
| 61421557 | Shell | A tough, multilayered structure secreted by the mantle, generally used for protection, but sometimes for body support | |
| 61421558 | Visceral hump | A hump that contains a mollusk's heart, digestive, and excretory organs | |
| 61421559 | Foot | A muscular organ that is used for locomotion and takes a variety of forms depending on the animal | |
| 61421560 | Radula | An organ covered with teeth that mollusks use to scrape food into their mouths | |
| 61421561 | Univalve | An organism with a single shell | |
| 61421562 | Bivalve | An organism with two shells |
