BIOL212 Word Scramble
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Structure | Function |
Mouth | Ingests soil |
Pharynx | Muscular region of digestive system specialized for pumping in soil |
Esophagus | Passageway between pharynx and crop |
Crop | Thin-walled chamber where food is temporarily stored |
Gizzard | Thick-walled, muscular chamber where soil is mechanically ground and usable organic materials are separated from indigestible materials |
Intestine | Long tube occupying the majority of the body in which nutrients are absorbed into the bloodstream |
Aortic arches | Specialized, muscular branches of the dorsal blood vessel that regulate blood pressure in the body |
Dorsal blood vessel | Longitudinal blood vessel that returns blood to the aortic arches |
Ventral blood vessel | Longitudinal blood vessel that distributes blood posteriorly to the body |
Seminal vesicles | Cream-colored, lobed organs fastened ventrally, but extending dorsally around each side of the esophagus, that store maturing sperm |
Testes | Site of sperm production |
Seminal receptacles | Ventrally located organs that receive sperm during copulation and store sperm until needed to fertilize ova in cocoon |
Ovaries | Site of ova production |
Nephridia | Paired excretory organs found along the lateral margins of all but the most anterior and posterior segments; they release waste fluids out of the worm through small pores in the body wall |
Septa | Thin, fleshy partitions between segments |
Cerebral ganglia | Small, bilobed structure lying dorsal to the pharynx in segments 3 and 4; houses majority of neural ganglia in the worm |
Ventral nerve cord | Long, white "cord" located along the ventral surface of the body; contains large swellings of ganglia in each segment that handle the majority of coordination without intervention of the cerebral ganglia |
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