ENDOSTYLE Meaning and
Definition
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The term "endostyle" refers to a specialized anatomical structure found in certain invertebrate organisms, particularly those belonging to the phylum Chordata, which includes animals such as tunicates and lancelets. The endostyle is a longitudinally-running glandular groove or fold, located on the ventral side of the pharynx.
This organ is characterized by its ciliated epithelium, and its primary function is the production of mucus, which plays a crucial role in the filtration and capture of food particles. The endostyle exhibits a high degree of structural and functional similarity to the thyroid gland in vertebrates.
In organisms with an endostyle, it typically serves as the precursor or evolutionary precursor to the thyroid gland. In vertebrates, the thyroid gland plays a key role in the production of hormones, which are essential for metabolism regulation. The presence of an endostyle in certain invertebrates supports the idea that it may have been a precursor to the thyroid gland in evolution.
The size and morphology of the endostyle can vary among different organisms. For example, in tunicates, the endostyle is usually present as a simple ciliated groove, while in lancelets, it may be longer and more complex.
Overall, the endostyle is an important anatomical feature that aids in the feeding and digestion processes of certain invertebrate organisms, and provides valuable insight into the evolutionary history of the thyroid gland.
Common Misspellings for ENDOSTYLE
Etymology of ENDOSTYLE
The word "endostyle" originates from the combination of two Greek words, "endo" meaning "inside" and "stylos" meaning "pillar" or "column". The term was first used by French naturalist François Péron in 1807 to describe a glandular groove found in the pharynx of the ascidians, a group of marine invertebrates. The endostyle is lined with ciliated cells and is involved in the production of mucus and the secretion of iodine, playing a role in filter-feeding and the production of thyroid hormones.
Similar spelling words for ENDOSTYLE
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