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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. |