Sentence examples for coelom from inspiring English sources
noun
A fluid-filled cavity within the body of an animal. The digestive system is suspended within the cavity, which is lined by a tissue called the peritoneum.
Within the coelomates, the coelom has been of variable significance to the form and diversity of the various phyla.
The Deuterostomia constitute one of two divisions of the coelomates (animals having a coelom).
The Protostomia constitute one of two divisions of the coelomates (animals with a body cavity, or coelom).
A body cavity, or coelom, is absent.
A coelom also is present in some more distantly related phyla, including Annelida, Arthropoda, and Mollusca, but the main organs of the body are arranged differently in these phyla.
Flatworms (phyla Platyhelminthes, Nemertea, and Mesozoa) lack a coelom, although nemerteans have a fluid-filled cavity at their anterior, or head, end, which is used to eject the proboscis rapidly.
The advantage of a true coelom is the ability of the inner mesenteric (mostly connective tissue) layer to suspend the central gut in the middle of the animal.
Suspension is the main function of the coelom in vertebrates, which achieve the largest body sizes among animals by virtue of an endoskeleton that does not need to be shed during growth.
Vertebrate eggs are almost universally shed into the coelom or into a subdivision thereof, from which they enter the female reproductive tract.
Nemerteans, in addition to a coelom-like housing for their proboscis, have attained a one-way gut and a closed circulatory system.
The adult hemichordate body and body cavities, or coeloms, are divided into three basic parts: the proboscis, collar, and trunk.
