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BIOL212
Majors animal: Anatomy of a roundworm (matching)
Structure | Fucntion |
---|---|
Mouth | Ingestion of food |
Pharynx | Muscular region of digestive tract that "pumps" food through the mouth and into the intestine |
Intestine | Ribbonlike digestive tract where absorption of nutrients occurs |
Anus | Elimination of indigestible wastes (egesion) |
Lateral lines | Longitudinal canals that function as the excretory system of the roundworm, releasing nitrogenous wastes in the form of ammonia and urea |
Pseudocoelom | Body cavity lined on the inside by a layer of gastrodermis and on the outside by a layer of mesoderm |
Testis | Produces sperm |
Vas deferens | Stores mature sperm and transports them to seminal vesicle |
Seminal vesicle | Enlarged tube representing terminal portion of male reproductive tract, which transports mature sperm out of the nematode |
Genital pore | Point of entry for sperm and opening through which fertilized ova are released from the body |
Vagina | Terminal portion of female reproductive tract, which receives sperm from males and directs ova through genital pore |
Branched uterus | Site where developing ova mature before being released |
Oviduct | Repository for ova produced in ovary until fertilization |
Ovary | Produces ova |