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BJU Press science
life science chapter 15
| Question | Answer |
|---|---|
| invertabrate | no back bone |
| vertabrate | back bone |
| porifera | a phylum of sponges that are dependent on pores |
| what phylum do jellyfish belong to | cnidaria many other animals with tenticals also belong to this phylum |
| hydrostatic skeleton | (water-standing) supported by the substance in them |
| gastrovascular cavity | found in the endoderm, where the jellyfish digests it’s food |
| what are the two layers of a jellyfish | ectoderm(outer layer), and endoderm( inner layer). They are both one cell thick |
| nematocysts | special cells found in the ectoderm, they have triggers that are tubelike And let out poison |
| stimulus | anything that causes a response in an organism |
| bilateral system | two equal sides |
| free living | they are not dependent on a host |
| neurons | long thin nerve cells that carry impulses from one point to another |
| nerve | a collection of neurons wrapped together in a protective coating |
| ganglion | an invertebrates coordination center, or simple brain |
| radial cemetery | can be divided equally in two by any plane. (cnidarians are this) |
| skeleton | mechanical support for muscles and body |
| filter feeders | organisms that filter through water and are fed by the plankton and such in the water |
| spicule or spongin | spiky or squishy |
| Collar cells | The cells that line the central cavity |
| Excretory pours | Tiny tube holes in which water and waste are disposed |
| Nematoda | The phylum in which roundworms belong |
| ascaris | A common roundworm that can be found in the intestines of various animals |
| List three round worms | Hookworms, pinworms, and vinegar eel |
| Pharynx | A muscular tube extended from the mouth of a planarian that sucks food up into the intestine |
| Tapeworms | Parasites found in the digestive tracts of various animals |
| Earthworm | A segmented worm in the phylum annelida |
| Name three segmented worm | Leeches, tubeworms, scale worms, sandworms, or fireworms |
| Cuticle | Protects the worms form harmful parasites |
| Sensory receptor | A structure that can sense a stimulus, and send an impulse traveling along a neuron |
| Nerve cord | A bundle of neurons that begins with two large nerve ganglia, and goes to the tail end of the worm |
| Esophagus | A tubular passageway that carries food from the pharynx to the crop |
| Crop | A swollen area that serves As a temporary storage chamber for food taken in by the earthworm |
| Gizzard | A bulge in the earthworms digestive track. Their muscular walls Contract and relax performing mechanical digestion |
| Close circulatory system | A continuous network of blood vessels, the blood remains in the vessels as it circulates throughout the earth warms body |
| Dorsal blood vessel | Along the back of the worm, it acts as a heart |
| What are you five pumps of dorsal blood vessel pumps to | Aortic arches |
| Capillaries | The tiniest blood vessel |
| Excretory tubules | A thread like tube that extracts waste from it’s body |
| Eukaryotes | a multicellular or unicellular organism, whose cell or cells have a nucleus and other membrane bound organelles |
| Name three members of phylum Annelida | Scale worms, Sandworms, tubeworms, leeches |
| When an earthworm moves this is the structure that holds on to the soil | jaws |
| Flame cells | cells that look like they are on fire, they help with the excretory process |
| What kind of symmetry do cnidarians have | radial symmetry |
| How does an earthworm breath | it exchanges oxygen and carbon dioxide through its moist skin |
| What is one key characteristic of sponges | filter feeders |
Created by:
ckproctor
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