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The majority of gastropods have haemolymph containing the respiratory pigment haemocyanin. This is a copper-containing protein that helps to carry oxygen, and gives the haemolymph a pale blue colour. In the freshwater Planorbid snails, however, the haemocyanin is replaced by haemoglobin , and thus their haemolymph is red rather than blue.
These secrete waste into the haemolymph, prior to further filtration in the nephridium. Pulmonates lack these glands, so that the nephridium is the only major organ of excretion. In some gastropods, the nephridium opens directly into the sinus, but more usually, there is a small duct, referred to as the renopericardial canal.
Hemolymph, or haemolymph, is a fluid, analogous to the blood in vertebrates, that circulates in the interior of the arthropod (invertebrate) body, remaining in direct contact with the animal's tissues. It is composed of a fluid plasma in which hemolymph cells called hemocytes are suspended. In addition to hemocytes, the plasma also contains ...
Gastropods (/ ˈ ɡ æ s t r ə p ɒ d z / ... Gastropods have open circulatory system and the transport fluid is hemolymph. Hemocyanin is present in the hemolymph as ...
In gastropods in many ancient lineages, the gills are bipectinate, having an overall shape that is similar to a bird's feather, with narrow filaments projecting either side of a central stalk. Gastropods such as abalone and keyhole limpets have two gills, which is believed to be the arrangement in the earliest fossil gastropods. The water ...
The San Francisco Giants are in agreement on a one-year, $15 million deal with starting pitcher Justin Verlander, ESPN reports. Verlander, who turns 42 in February, will join the Giants for his ...
Walmart Inc. president and CEO Doug McMillon is among the company's early users of drone delivery, which has faced a number of obstacles. Here, he delivers a keynote address during CES 2024 at The ...
Chad Duell is leaving General Hospital with a bang.. The Jan. 6 episode of the long-running soap opera marked the beginning of the 37-year-old actor's exit storyline when his character Michael ...