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17 Cards in this Set
- Front
- Back
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Septa are....
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Walls of Mesoderm
Divide hydrostatic skeleton segments move individually |
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Muscles
Types? Move How? |
Circular-lenghten body
Longitudinal-shorten and widen body (bristles grip) |
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Polychaeta
Means? Examples? |
"Many Bristles"
Tube Worms, Sand Worms |
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Polychaeta Appendages
(Parapodium) (3) |
Paired
w/ bristles Notopodium (respiration), Neuropodium (sensory & locomotion) |
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Polychaeta Reproduction (3)
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No clitellum
dioecious trochophore larvae |
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Polychaeta Types (2)
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Sedentary-tube worms, ciliary feeders
Errant-free living sand worms |
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Hirudinae
Means? |
leech
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Hirudinae reproduction
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Hermaphrodites
clitellum secretes cocoon direct development (no larvae) |
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Hirudinae attachment
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no setae
suckers @ anterior & posterior |
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Hirudinae Coelom
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Filled with connective tissue
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Oligochaeta
Means? Examples? |
"Few Bristles"
Earthworm |
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Oligochaeta Digestive System
Sections (5) Intestine features (2) |
Sections:
Mouth, pharynx, crop (storage), Gizzard (grinding) Features: Typhosole (folding-increases absorption) Chloragogen (surrounding tissue stores fats like liver) |
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Oligochaeta Circulation
2 liquids pumping & passage |
Coelomic Fluid-nutirents &waste
Blood-hemoglobin & unspecialized cells Dorsal vessel pumps blood through 5 aortic arches to ventral vessel |
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Oligochaeta Respiration
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Through cuticle & epidermis if moist
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Oligochaeta Excretion
3 funtions |
Repeated metanephridia
1. Draw fluid through septum into tubule 2. Gather waste while wrapped around vessels 3. Dump wastes through nephidopore |
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Oligochaeta Nervous system
Path of impluses Types of nerves (2) and cells (1) |
Sense organs in Prostomium>Paired ganglia>nerve cords on ventral side
Sensory & motor neurons Neurosecretory cells (regulate reproduction) |
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Oligochaeta Reproduction
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Monoecious
Mucus secreted from clitellum binds worms Seminal vesicle>seminal groove>seminal recepticle Cocoon (mucus & chitin) where external fertilization occurs |
