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| an organism that has both male and female sex organs |
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| specialized cells that remove excess water from the body |
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| the segments that make up most of the worm's body |
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| sepcialized cells that use flagella to move a steady current of water through the sponge |
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| specialized cells that move around within the walls of the sponge and create spicules |
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| controls amoung of light entering eye which consists of many muscles |
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| disk located behind iris that changes shape to help focus the eye |
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| inner layer of eye that contains photoreceptors |
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| type of photoreceptor that is extremely sensitive to light, but cannot distinguish colors |
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| type of photoreceptor that responds to light of different colors |
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| clear fliud in the anterior chamber of eye between the cornea of iris |
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| a transparent, jellylike substance within the center of the eyeball |
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| tightly coiled, fluid filled snail shell structure which houses the sound receptors |
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| eardrum/tympanic membrane |
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| membrane that vibrates as sound waves, transported via auditory canals, strike it |
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| canals in the inner ear which detect rotation of the head and are important in the maintenance of balance |
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| connects the middle ear with the roof of the mouth |
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| produce sweat; takes heat and wastes away |
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| produce oily secretion called sebum; spreads out along surface of skin and helps to keep keratin-rich epidermis flexible and waterproof |
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| bell shaped body with mouth on bottom, moves with tentacles |
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| cylindrical body with armlike tentables, mouth points upwards, sessile |
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| chisel-like; used for cutting, gnawing, and grooming |
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| pointed; used for piercing, gripping, and tearing |
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| premolars (bicuspids) or molars |
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| interlock during chewing, like blades of scissors |
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| connect bones with muscles |
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| hold bones together at a joint |
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| supports the body and is softer than bone |
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| cell fragments released by bone marrow that helps in blood clotting |
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| white blood cells/leukocytes |
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| defend the body against infection, also known as __________ |
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| circulates in your system and gobbles up foreign material and cellular trash |
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| do not attack pathogens, call on help of killer T cells and B cells |
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| recognize and destroy body cells that have been infected with the virus |
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| have unique receptor proteins on surface (antibodies); release copies of antibodies into bloodstream or attach them directly to pathogens |
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| long fibers that carry impulses away from the cell body of a neuron |
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| extension of the cell body of a neuron that carry impulses from the environment or from other neurons toward the cell body |
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| area of the brain responsible for all voluntary activities of the body |
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| structure that connects the brain and spinal cord, includes medulla oblongata and pons |
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| region of the brain that coordinates body movements |
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| brain structure that acts as a control center for recognition and analysis of hunger, thirst, fatigue, anger, and body temperature |
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