Chapters 33 & 34 Flashcards
The common jellyfish moves form the blastula state to a ciliated larva called a ___.
planula
The genus Aurelia belongs to which class of cnidarians?
scyphozoa
Name some of the characteristics of Porifera.
hermaphroiditic, multicellular, sessile
Respiration in Porifera occurs through ___.
simple diffusion
The jellylike substance between the two cell layers that make up the body of a Porifera is ___.
mesohyl
Pores in teh body of the sponge wall where water enters the organism are the ___.
ostia
Songin is ___.
protein fibers that make up the skelton of some sponges
Bell-shaped cnidarians specialized for swimming occur in this form.
medusa
cells that crawl around the body of a sponge and pick up and deliver nutrients are ___.
amoebocytes
The inner cell layer of cnidarian is the ___.
gastrodermis
The long coiled filament organelle specialized for paralyzing and capturing prey is ___.
nematocyst
The characteristic that allows cells of a sponge to regroup into a new or same sponge is ___.
recognition
This organ coordinates all of the body activities of a cnidarian.
nerve net
A freshwater hydra reproduces ___ during warm summer months.
asexually
Species Obelia and Physalia belong to which class of cnidarians?
hydrozoa
The sea anemone and coral belong to which class of cnidarians?
anthozoa
The sensory structure found in most ctenophores that allows the animal to sense its position in the water as well as coordinate its movements is the ___.
apical organ
The digestive system of cnidarians as well as their form of indirect development classify them as ___.
protostomes
flatworms have no need for circulatory or respiratory systems because ___.
the flattened body shape allows for diffusion of gasses into cells
Name some facts about tapeworms.
They can infect a person who eats undercooked beef. They can grow very large in human intestines. They do not have a digestive system.
What uses a snail as an intermediate host?
schistosoma
Describe the eggs of ascaris.
They are carried by human waste. They can survive in the soil for years. Develop into larvae in the intestine.
Name three types of roundworm that live a parasitic life.
ascaris, enterobius, trichinella
The thick protective covering on endoparasitic flukes that prevents them from being digested by their host is the ___.
tegument
Name some structures that help planarians deal with water entering their bodies by osmosis.
flame cells, excretory tubules, and cilia
Taenia saginatus is a tapeworm from the class
cestoda
The knob-shaped organ with hooks and suckers on a tapeworm is called the ___.
scolex
The primary hosts of Taenia saginatus are ___.
humans
Nematodes are ___.
pseudocoelomates
Cnidarians are ___.
coelenterates
Most trematodes enter their human host by ___.
boring through the skin and into the blood vessels
Each mature tapeworm prolgottid ___.
contains both male and female reproductive organs; contains fertilized eggs that develop into larvae; is eliminated in feces
The roundworm that feeds on blood from the intestinal wall of cats, dogs, and humans is the ___.
hookworm
The intestinal parasite causing trichinosis is ___.
trichinella
The most common parasitic worm infection in the U.S. is ___.
Enterobius
The parasitic nematode that uses a mosquito as its vector is the ___.
Filaria
Name some characteristics of rotifers.
They are 100-500 µm in size. They are free living and nonparasitic. They are multicellular with complex organ systems.
The parasitic nematode affecting the lymphatic system and causing elephantiasis is ___.
filaria
Name some characteristics of a ctenophore.
colloblasts, apical organ, bioluminescence
parthenogenesis
rotifera
amoebocytes
porifera
flame cells
platyhelminthes or rotifera
proglottids
platyhelminthes
cnidocytes
cnidaria
schistosoma
platyhelminthes
nerve net
cnidaria
choanocytes
porifera
medusa
cnidaria
mastax
rotifera
acoelomates
platyhelminthes
