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| Characteristics of Animals |
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Definition
| Heterotrophic, eukaryote, multicellular, and lack cell walls. |
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Definition
-Animals without backbones
-95% of animals are invertebrates
-ex: sea stars, worms |
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-Animals with backbones
-5% of animals are vertebrates |
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| Seven Functions Animals Carry out |
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Definition
-Feeding -Response
-Respiration -Movement
-Circulation -Reproduction
-Excretion |
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| Aquatic animals that strain food from water. |
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| Animals that feed on decaying plant and animal material. |
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| Process in which animals take in oxygen and release carbon dioxide through lungs, gills, skin, or diffusion. |
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Definition
| Maintains homeostasis by eliminating metabolic wastes (ammonia, urea) |
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Definition
| Using receptor cells and nervous cells. |
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| Cells that respond to sound, light, and other external stimuli. |
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| Word used to describe animals that can move usually through muscle contraction and support from a skeleton. Animals that can't move are described as sessile. |
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| 4 Characteristics of complex animals |
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Definition
- High levels of cell specialization
-Internal body organization
-Bilateral body symmetry
-A body cavity |
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Definition
| From tissues, which form organs, which form organ systems. |
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Definition
| A hollow ball of cells; produced from a zygote after it undergoes a series of divisions. |
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| An animal whose mouth is formed from the blastopore. |
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Definition
| An animal whose anus is formed from the blastopore. |
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Definition
| The innermost germ layer that developes into the digestive tract and the respiratory system. |
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Definition
| The middle germ layer, develops into muscles, excretory, circulatory, and reproductive systems. |
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Definition
| The outermost germ layer, develops into sense organs and the outer layer of skin. |
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Definition
Symmetry in which the body parts repeat around the center (shaped like a wheel).
ex: sea anemone, starfish |
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Symmetry in which any number of planes can divide the body into two equal halves (same on the left and the right).
ex: worms, insects |
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Definition
No patterns
ex: corals, sponge |
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| When a body is made up of many repeated and similar parts, or segments. |
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| The anterior concentration of sense organs and nerve cells at the front end of the body (to have a head). Animals with cephilization respond to the environment quicker and are more complex. |
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Definition
| A fluid-filled space that lies between the digestive tract and the body wall. It provides a space in which internal organs can be suspended so that they aren't pressed on by muscles or twisted out of shape by body movements. |
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