Test 6- Segmented Worms Flashcards
Annelus means ___
Little rings
Segmentsted worms have ____, ___ and ___ system
Circulatory, digestive and excretory
They have a true ___
Coelom
Coelom is ____
Body cavity that allows one to have true organ system and muscular layers
Posses complex ____ and ___ system
Digestive and circulatory
They have defined _____and ____ systems
Nervous, excretory
They have no developed ___ systems
Respiratory
They respire by ___
Deffusion
They contain a ___ to hold ___
Cuticle , moisture
Segmented into a sequence of department by ___
Septa
Segments are marked by rings called ___
Annuli
Reproduce asexually and ___ by ____
Sexually, regeneration
They are hernahyoditic with _____ fertilization
Hernahyoditic meaning ____
Cross fertilization
Having both sex parts
Are found in __, ____ and __ environment
Terrestrial, freshwater and marine environment
They range in size for less than ____ to over ___
Example: ____
1mm to over 3 meters
Example : steep tube worm
Digestive system is a ___ tube including a ___ and ____ with specialization of ___ organs
One way tube
Mouth and Anus
Digestive
They have a ___ circulatory system
Closed
They have ___ blood vessels that run the length of the worm
2
Blood is pumped thru the ___ and ___ blood vessels by __ hearts
Dorsal , ventral , 5
_____ is in the blood to carry O2
Hemoglobin
Excretory system includes____
Nephridia
Nephiridia is _____ kidneys which eliminate ___
Primitive, waste from the blood
Nervous system includes ___
With a primitive __ and ____
Cephalization with a primitive Brain and ventral nerve cord
They have no defined sensory ____
Organs
Although Earthworms are hermaphroditic they still ___ to mix their gametes
Copulate
Earthworms are Alamo capable of regrowing ___ segments in their body
Amputated
Earthworm contains \_\_ major forum of muscles used in locomotion Which includes \_\_\_\_ *describe And \_\_\_\_\_ *describe
2,
Longitudinal muscles - contract to make work shorter
Circular muscles- make worm thinner
Ecological roles of Annelids *3
Helps to cycle nutrients and minerals thru souls thru their poops
Burrowing and keeping soil
structure open
Acts as composers and helping to create dead organic matter into fertile soil
