nematoda Flashcards
What are some ways nematoda is different from annelida?
lack of segmentation, lack of circular muscles, presence of cuticle
What type of digestion system is found in nematoda?
complete
What type of circulatory system is found in nematoda?
none, nutrient transport accomplished by pseudocoelom fluid
What type of respiratory system is found in nematoda?
none, gas diffusion occurs across body wall
Are nematoda monoecious or dioecious?
dioecious
What is the process of shedding the cuticle called?
ecdysis
How can you tell the difference between a male and female nematoda?
males have a curled tail with a spicule located at the end
How can you tell the difference between the intestine, the uterus, the oviducts, and the ovaries in a female nematode?
the intestine appears like a flat noodle, the uterus is the largest and widest, the oviducts appear like spaghetti noodles and are slightly larger than the ovaries, appearing like angel hair noodles
How can you tell the difference between the testes, vas deferens, and the intestines in a male nematode?
the testes are the smallest in diameter and appear like angel hair, the vas deferens is sightly larger and appears like spaghetti, and the intestine appears like a flat noodle
Are nematodes triploblastic? if so, what is their body cavity called?
yes, their body cavity is only a pseudocoelom however
What body symmetry do nematodes exhibit?
bilaterally symmetrical
What is the function of the spicules in males?
grasp the female during copulation
What is the function of the lateral lines?
canals functioning as the excretory system of the nematode, excreting waste in the form of ammonia and urea
What is the function of the testis in males?
produce sperm
what is the function of the vas deferens in males?
store sperm and transport to seminal vesicle
