Basal Plate


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Basal Plate

 

(1) An elastic, unstructured plate situated under the single-layer surface epithelium in some groups of invertebrates (ciliated worms, nemerteans), Hemichordata (Balanoglossus), and Cephalochorda (lancelets). It is formed from the secretions of epithelial cells. It separates the epithelium from the underlying musculature or connective tissue and serves as an attachment for muscles.

(2) In hydroid polyps, the basal plate (corresponds to the mesoglea in medusae) is a delicate unstructured plate lying between the ectoderm and endoderm.

References in periodicals archive ?
In the basal plate the majority of decidual cells are destroyed.
Finally, the fenestra prootica and metoptica are continuous because the pila antotica does not have contact with the basal plate.
The chorionic plate indentation reaches the basal plate, which contains almost confluent, very reflective areas.
Be sure to include a portion of the basal plate with each section (Fig.
Garlic cloves should be planted pointed tip up, basal plate down, with the top of the bulb 1" - 2" below the soil in mild climates and 2" - 4" deep in cold weather areas.
1B) with maedian lobe slightly emerge between the parameres, narrower long spindle like, apically narrower long tip; parameres with apical margin rounded with laterally distinct spinose, medially narrower, sinuate, dilated posteriorly; two median struts close to each other, hanging in the cavity of basal plate, basal plate broad, sides rounded, base subrrounded, feebly sclerotised laterally.
But make sure to remove them very carefully so that they come off with their basal plate (the very bottom of the bulb, where the roots grow) intact, or they will not grow.
Aedeagus with median lobe, narrower, apically long apex, parameres contact to median lobe, basal plate rounded, median strut slightly passes in the cavity, female genitalia with bursa copulatrix leaf-like with several denticles, tubercles on surface .