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40 Cards in this Set
- Front
- Back
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 |
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prostonium
|
upper lip
-helps gather soil in mouth |
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clitellum
|
enlarged band that functions in reproduction
|
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setae
|
bristle-like structures on the ventral surface used for traction
|
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septa
|
cross walls that divide body into segments
|
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Digestive system includes (6- no descriptions)
|
1. pharynx
2. esophagus 3. crop 4. gizzard 5. intestines 6. anus |
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pharynx function in digestion
|
sucks in soil
-white and fuzzy |
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esophagus function in digestion
|
trasports food
-can't see on worm (underneath other organs) |
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crop function in digestion
|
sac-like structure that stores food
-soft and squishy -like stomach |
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gizzard function in digestion
|
muscular structure that grinds food with grit from soil
-hard |
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intestines function in digestion
|
where nutrients are absorbed
-most of worm |
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anus function in digestion
|
where waste exits the body
|
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blood function in circulatory
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transport tissue
-light brown when preserved |
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closed system (circulatory)
|
blood moves through vessels
|
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5 aortic arches (circulatory)
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"hearts" wich relax and contract to pump blood
-small and black |
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skin in respiratory function
|
moist for gas exchange
-O2 in -CO2 out |
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cuticle
-respiration function |
secreted by the epidermis to keep skin from drying out
|
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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
|
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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
|
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ovaries
-funciton in reproduction |
lay eggs into the slim ring
|
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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
|
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What phylum do earthworms belong to?
|
Phylum Annelida
|
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What class do earthworms belong to?
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Oligochiaeta
|
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What end is the clitellum located neareast?
|
anterior (head)
|
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What side was the dissected worm cut on?
|
dorsal
|
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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 |
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ventral
|
tummy
-light -clitellum not full |
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anterior
|
head end
-clitellum closest to |
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posterior
|
tail end
|
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coelom
|
fluid filled body cavity (cushion)
-must have mesoderm on both sides |
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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 |