WORM VOCAB ONLY

One of the external bristles on annelids ______________ A pair of nerve clusters that serve as a brain at the anterior end of some invertebrates _________________ A thickened section around an earthworm’s body that ______________ produces mucous for reproduction Seta (Setae) Cerebral ganglia clitellum

Flame cell hermaphrodite typhlosole In a flatworm, a cell that collects nitrogen waste and excess body water for the excretory system and excretes it through the skin ______________ An organism that produces both male and female gametes (sperm & eggs) _________________ An infolding of the intestinal wall of an earthworm that increases surface area to absorb more nutrients ________________ Flame cell hermaphrodite typhlosole

Fleshy flap of skin that overhangs the mouth of an earthworm and senses light/dark ________________ A NON-CELLULAR LAYER in parasitic round worms that protects them from the host’s digestive and immune system (also seen in earthworms)_________________ A structure in a female or hermaphrodite that receives sperm ________________ prostomium cuticle Seminal receptacle

tegument nephridia septa A continuous sheet of FUSED CELLS that covers the external surface of a fluke or tapeworm & protects the worm from the host’s digestive and immune system __________________ Tubule through which some invertebrates (like segmented and round worms) eliminate nitrogen waste _________________ Dividing walls that separate the coelom into compartments in an earthworm ________________ tegument nephridia septa

Type of circulatory system in which blood is contained in vessels______________ Type of development in which young start as an immature larva and must undergo metamorphosis to become adults _______________ Type of reproduction in which offspring are produced by combining genetic material from 2 parents ________________ closed indirect sexual

pharynx Aortic arches scolex Muscular part that pulls food into the digestive system______________ 5 pair of muscular tubes which connect the dorsal and ventral blood vessels and force blood through the circulatory system ________________ A knob shaped organ bearing hooks and suckers that lies at the anterior end of a tapeworm ________________ pharynx Aortic arches scolex

One of the many body segments of a tapeworm containing reproductive organs ______________ The structure that stores soil waiting to be digested in earthworms _________________ A muscular region in the digestive tract of earthworms that crushes and grinds food ________________ proglottid crop gizzard

The host in which the adults of a parasitic worm live and reproduce ______________ A disease characterized by muscle pain and stiffness caused by a parasitic blood fluke of the genus Schistosoma _________________ A carbohydrate found in the cocoons of earthworms and the exoskeletons of some arthropods ________________ Primary host schistosomiasis chitin

Structure that stores sperm made to give away to other worms ______________ Type of coelom seen in earthworms in which the body cavity is lined on both sides by mesoderm _________________ Flatworm phylum that includes Planaria, flukes, and tapeworms ________________ Seminal vesicles Eucoelom or “true” coelom Platyhelminthes

Ring around the body of an earthworm that produces mucous for reproduction ______________ Traction bristles on the ventral surface of an earthworm _________________ Round worm phylum that includes Ascaris, pinworms, hookworms, and filarial worms________________ clitellum setae Nematoda

Reproductive organ that produces eggs ______________ A disease caused by a parasitic round worm of the genus Trichinella; characterized by muscle pain and stiffness _________________ Opening for digestive waste in an earthworm ________________ ovary trichinosis anus

Reproductive organ that produces sperm ______________ A cluster of nerve cells_______________ Segmented worm phylum which includes earthworms and leeches ________________ testes ganglia Annelida

Development in which offspring hatch or are born with a similar shape as the adult form and must just grow bigger ______________ Type of symmetry in which dividing the animal produces 2 mirror images _______________ Ability to regrow lost body parts ________________ direct bilateral regeneration

Type of reproduction in which offspring are produced from the genetic material of only one parent______________ Body system that removes nitrogen waste and maintains the balance of ions/water _______________ Digestive organ in an earthworm where nutrients are absorbed ________________ asexual excretory intestine

Shared one opening digestive/circulatory space seen in Planaria ______________ Joining of sperm and egg outside the mother’s body_______________ Maintaining the balance of water and ions in the body _______________ Gastrovascular cavity External fertilization osmoregulation

Concentration of a “brain” and sensory organs at the anterior end of an animal______________ Outside body covering on an animal_______________ Body system that exchanges gases with the environment________________ cephalization integument respiratory

Line that runs from the male genital pore to the clitellum along which sperm travels______________ Type of coelom seen in flatworms with no space around the internal organs_______________ Sperm groove acoelom

Opening for sperm leaving an earthworm to be given away ______________ Space around body organs ______________ Organism with spiral determinate cleavage whose blastopore becomes its mouth ________________ Male genital pore coelom protostome

Class to which earthworms belong ______________ Organisms without a backbone _______________ Oligochaeta invertebrates