bio Flashcards
what are flatworms
are accoelomates because they lack a coelom
roundworms
are pseudocoelomates because they do not have a pentoneum covering the irregular body cavity
segmented worms
such as earthworms are coelomates with a true coelom
The circulatory system of the earthworm is a closed system. This means that the earthworm circulates blood exclusively in _________
blood vessels
There are three main vessels that supply blood to the organs of an earthworm
They are the _____________dorsal blood vessell ____________, the __________ventral blood vessels____________________ and the _pseudohearts / aortic arches
The ________ ventral blood vessels ________________, located on the ventral surface, is thin walled and carries blood towards the
posterior end of the earthworm
Conus arteriortus
sac on the front of the heart
Truncus arteriotus
2 main arhes of the heart deliver blood to smaller arches
carotid
Takes blood to the head
aortic
Joins to form the dorsal aorta
Sinus venosus
Receives blood from the vena cava
Polmonary veins
Return blood from body areas to the heart
pancreas produces
Pancreas produces pancreatic fluid which also contains many digestive enzymes.
what is ecology
s the study of the relationships and interactions between organisms and their environment
canada has __ biomes
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