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What you are referring to is the sinus. The crayfish's gills are used to extract oxygen that is dissolved in water and lead it into the crayfish's open circulatory system. This type of circulatory system doesn't limit the blood to blood vessels; instead the blood collects in the pericardial sinus, the cavity surrounding the dorsal heart. (Porch and Batdorf 477) From there the dorsal heart pumps the blood through short vessels, which empty into internal cavities and bathe the organs. After the blood bathes the organs and drains from these cavities, it flows into the large sternal sinus. The blood then passes through the gills, becomes oxygenated, and returns to the pericardial. The green glands, located near the base of the antennae, filter out waste as the blood circulates. Then the waste is excreted through a pore just in front of the Crayfish's mouth.
Reference:
Bob Jones University-Thomas E. Porch, and Brad R. Batdorf. Biology. Greenville, South Carolina: BJU Press, 2005.
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Does the crayfish have a thorax?
Not exactly, it has a cephalothorax, which is a head and thorax fused together.
What segment is the heart located in the crayfish?
in the left part of the thorax
Do crayfish have bristles?
Yes they do have bristles. They have three main places where they are at.In the Thorax the Abdomen And the Exopodite.
What happens to the head and thorax of the crayfish over time?
? I Need this for science fair so if any scientist knows it that be great!
Which body region of the crayfish is most obviously segmented?
The Three Regions are 1) The Head 2) Thorax 3) Abdomen The Head has 5 segments The Thorax has 8
Are crayfish insects?
Insects must have a head, thorax, and abdomen. They have three pairs of legs and usually two pairs of wings. The crayfish obviously doesn't have wings, (not sure about the other requirements) so it is not an insect.
Does the thorax on a crayfish help it breath?
No, it's just it's self destruction, like how bees sting you and die if in threat, if it becomes in threat that just sets off some dynamite like substance and it cooks from the inside then BOOM! Crayfish guts everywhere.
What are the structures of a crayfish?
The main structures of a crayfish under the exoskeleton of the abdomen are the Cephalothorax and the abdomen. The Cephalothorax is made up of the head and thorax and the abdomen has 7 segments.
What body part are the legs and wings attached to?
The thorax. See the related link for more information.
How does a crayfish molt?
A crayfish molts by bending its body and quickly shoving its head out of a cut in the back of its old exoskeleton.
What anatomical position is the head to the thorax?
the head is superior to the thorax. the thorax is inferior to the head.
What is an ants thorax?
The thorax of an ant is considered to be its powerhouse. The thorax is the portion of the body to which the ant's legs are attached. There are three sections to the thorax in ants.
