What is "papillae"

Usage examples of "papillae".

Besides the glands, both surfaces of the leaves and the pedicels of the tentacles bear numerous minute papillae, which absorb carbonate of ammonia, an infusion of raw meat, metallic salts, and probably many other substances, but the absorption of matter by these papillae never induces inflection.

After a leaf had been left in a weak infusion of raw meat for 10 hours, the cells of the papillae had evidently absorbed animal matter, for instead of limpid fluid they now contained small aggregated masses of protoplasm, which slowly and incessantly changed their forms.

The two terminal cells of the papillae first become much elongated in a line parallel to the inner surface of the bladder.

They are covered exteriorly with papillae of different sizes, many of which have an elliptical outline.

A similar result followed from an immersion of only 15 minutes in a solution of one part of carbonate of ammonia to 218 of water, and the adjoining cells of the tentacles, on which the papillae were seated, now likewise contained aggregated masses of protoplasm.

In cold countries the cutis is constringed and the papillæ compressed: the military glands are in some measure paralytic.

Both surfaces of the leaf, the pedicels of the tentacles, especially the lower sides of the outer ones, and the petioles, are studded with minute papillae (hairs or trichomes), having a conical basis, and bearing on their summits two, and occasionally three or even four, rounded cells, containing much protoplasm.

These papillae are generally colourless, but sometimes include a little purple fluid.

The latter, as well as the papillae, are probably rudiments of formerly existing tentacles.

We may therefore conclude that when a leaf has closely clasped a captured insect in the manner immediately to be described, the papillae, which project from the upper surface of the leaf and of the tentacles, probably absorb some of the animal matter dissolved in the secretion.

These papillae are, I believe, rudiments of formerly existing tentacles together with their glands.

Nor does it depend on increased secretion from the glands, and this is shown by several facts, more especially by the papillae, which do not secrete, yet undergoing aggregation, if given carbonate of ammonia or an infusion of raw meat.

The outside of the leaves and the petioles are covered with minute two-armed papillae, evidently answering to the eightrayed papillae of Dionaea.

On both surfaces there are many small papillae, crowned with two hemispherical cells in close contact.

The papillae thus formed are exactly like those on the surfaces of the leaves.