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40 Cards in this Set

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Phylum Annelida
ex.
1. general characteristic
2-6. body parts
ex. earthworm and leech
1. complex body structures
2. prostonium
3. mouth and anus
4. clitellum
5. setae
6. septa
prostonium
upper lip
-helps gather soil in mouth
clitellum
enlarged band that functions in reproduction
setae
bristle-like structures on the ventral surface used for traction
septa
cross walls that divide body into segments
Digestive system includes (6- no descriptions)
1. pharynx
2. esophagus
3. crop
4. gizzard
5. intestines
6. anus
pharynx function in digestion
sucks in soil
-white and fuzzy
esophagus function in digestion
trasports food
-can't see on worm (underneath other organs)
crop function in digestion
sac-like structure that stores food
-soft and squishy
-like stomach
gizzard function in digestion
muscular structure that grinds food with grit from soil
-hard
intestines function in digestion
where nutrients are absorbed
-most of worm
anus function in digestion
where waste exits the body
blood function in circulatory
transport tissue
-light brown when preserved
closed system (circulatory)
blood moves through vessels
5 aortic arches (circulatory)
"hearts" wich relax and contract to pump blood
-small and black
skin in respiratory function
moist for gas exchange
-O2 in
-CO2 out
cuticle
-respiration function
secreted by the epidermis to keep skin from drying out
nephridia
-excretory function
-analogous?
openings in the skin (2 per segment) where wasteses leave the worm
-analogus to kidneys (same function different structure)
small nerve centers
-nervous system function
brain
ventral nerve cord
-white string
ganglia
-nervous system function
enlarged nerve centers
seminal vesicles
-function in reproduction
where sperm leave worm
- big ones
seminal receptacles
-function in reproduction
where sperm are received in the worm
- small ones
clitellum
-function in reproduction
forms slime ring
ovaries
-funciton in reproduction
lay eggs into the slim ring
reproduction process
as slime ring moves foward on the worm, sperm are released into ring and fertilize the eggs. The ring slips off and forms a cocoon for the young worms to develop in
What phylum do earthworms belong to?
Phylum Annelida
What class do earthworms belong to?
Oligochiaeta
What end is the clitellum located neareast?
anterior (head)
What side was the dissected worm cut on?
dorsal
2 ways in which earthworm's body is adapted to life in the soil
1. prostonium helps gather soil into mouth
2. gizzard helps digest soil
dorsal
back
-dark
-clitellum is full
ventral
tummy
-light
-clitellum not full
anterior
head end
-clitellum closest to
posterior
tail end
coelom
fluid filled body cavity (cushion)
-must have mesoderm on both sides
2 germ layer acoelomate
-def/body plan
-ex
-complexity?
ectoderm and endoderm not separated by cavity
-cnidarians
-least complex
3 germ layer acoelomate
-def/body plan
-ex
ectoderm, mesoderm & endoderm not separated by cavity
-flatworms
pseudocoelm
(pseudocoelomate is structure that has this)
cavity that forms between the mesoderm and the endoderm
-roundworms
coelomate
has a coelom that develops w/in mesoderm
-earthworms and everything beyond