18 Questions
What is the purpose of the gill bailer's reversal of current every few minutes?
To loosen and flush out silt and debris from the gills
What is the primary function of the gill bailer in the branchial chamber?
To drive water forward in the channel and out of the branchial chamber
What is the color of the mature, egg-filled ovaries of the female American lobster after cooking?
Bright red
Where do the paired oviducts terminate in the female American lobster?
At the base of the third pair of thoracic legs
What is the shape of the ovaries in the female American lobster?
H-shaped
What is the stage of ovarian development indicated by the color of the ovaries?
Color of the ovaries
What type of sensory cells are found on the edges of the mantle-lobes?
Tactile and photoreceptors
What is the reproductive system of freshwater clams characterized as?
Dioecious
What is the name of the parasitic larval stage in freshwater clams?
Glochidium
Where are the gonads located in freshwater clams?
Among the intestinal coils in the visceral mass
What is the function of the coelornic epithelium in the gonads?
To produce gametes
Where do the genital apertures open into?
The supra-branchial chamber of the inner gill lamina
What is the function of the cecum in a crab?
To regulate the concentration of salts in the hemolymph in dilute media
How does the blood circulation system in a crab differ from that of a shrimp or lobster?
It is similar, with no notable differences
What is the role of the sternal artery in a crab's circulatory system?
It carries blood ventrally into the abdomen
What is unique about the heart of a crab?
It is broad and fills much of the pericardial sinus
What is the main difference between the ventral abdominal artery of a crab and a lobster?
The crab's artery is smaller and less complex
What is a characteristic of the nervous system of most crabs?
It is highly fused and centralized
Learn about the internal structure of a branchial chamber, including the gill bailer and its role in water circulation. Understand the process of water flow and its reversal. Test your knowledge of this intricate system!
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