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Animal Kingdom
Vocabulary
| Term | Definition |
|---|---|
| Sessile | No Movement |
| Sedentary | Animals that move very little are said to be..... |
| Zygote | What we call the fertilized egg. |
| Cleavage | The zygote goes through rapid cell division called.... |
| Blastula | A hollow ball of cells created through the process of cleavage. |
| Asymmetry | Occurs when the body can't be divided into similar sections. |
| Radial symmetry | Occurs when body parts are arranged around a central point like spokes on a wheel. Many lines of symmetry. |
| Bilateral Symmetry | Occurs when animals can be divided into equal halves along a single plane. Only ONE line of symmetry. |
| Acoelomate | Does NOT have a body cavity. |
| Pseudocoelomate | Animal has a body cavity that is NOT fully lined with mesoderm. |
| Coelomate | Animal has a true body cavity that is fully lined with mesoderm. |
| Cellular Level | When does life begin. |
| Gastrovascular Cavity | Digestive system with one opening. Called a two-way digestive system. |
| Digestive Tract | A one-way digestive system with a mouth and an anus. |
| Circulatory System | Functions is to transport oxygen and nutrients to cells. Also responsible for carrying away wastes and carbon dioxide from cells. |
| Open Circulation System | Blood is pumped out of blood vessels to bathe tissues in the body cavity. |
| Closed Circulation System | Blood remains inside blood vessels until it reaches cells. |
| Exoskeleton | Skeleton on the outside of the body made out of Chitin. |
| Endoskeleton | Skeleton on the inside of the body and made out of bone, cartilage, or both. |
| Hydrostatic Skeleton | A fluid-filled internal cavity providing support. |
| Parthenogenesis | Females of some animals produce eggs, but the eggs develop without being fertilized. |
Created by:
jphokie05