basal disc

[′bā·səl ′disk]

(biology)

The expanded basal portion of the stalk of certain sessile organisms, used for attachment to the substrate.

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The pastry was slightly overdone so it was at least crisp but an overflow of filling had been burnt black in the oven, creating a crunchy black basal disc.

TABLE TALK: A SUBTLE BLEND OF... SITUATED ON A ROAD WITH HIGH FATALITY RATES, GREASY PLATES, AND A LITTLE FOOD THROWN INTO THE MIX MAKE THIS PLACE A REAL FUSION FOR THE SENSES - AS ALISON DAVISON FOUND OUT

These cells remain in the attached, now basal, end of the metamorphosing animal [ILLUSTRATION FOR FIGURE 18 OMITTED]; where the upright portion of the pawn connects to the basal disc is a sharp demarcation between presence of interstitial cells in the base and absence of these cells above the base.

Along the body stalk, the region of the animal that connects the basal disc to the head, are scattered ectodermal interstitial cells and a few endodermal interstitial cells (Table I).

These cells are confined to the substrate-attached basal disc region of the metamorphosing animal and resemble the pattern described for the disc stage (Table I).

In the pawn a few ganglion cells differentiate in the basal disc (Table I).

Stages of larval development and stem cell population changes during metamorphosis of a hydrozoan planula

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