yelk

It contains a mass of viscid nutritive matter -- the 'yelk' -- within which is inclosed a second much more delicate spheroidal bag, called the 'germinal vesicle' (a).

Lectures and Essays Thomas Henry Huxley 1860

It contains a mass of viscid nutritive matter -- the 'yelk' -- within which is inclosed a second much more delicate spheroidal bag, called the 'germinal vesicle' (a).

On the Relations of Man to the Lower Animals Thomas Henry Huxley 1860

The remains of the yelk, which have not yet been applied to the nutrition and growth of the young animal, are contained in a sac attached to the rudimentary intestine, and termed the yelk sac, or

Essays 2007

Special names have been given to these parts of the ovum; the cell-body is called the yelk (vitellus), and the cell-nucleus the germinal vesicle.

The Evolution of Man — Volume 1 Ernst Heinrich Philipp August Haeckel 1876

The space between the skin-layer and the gut-layer (the remainder of the segmentation-cavity) remains full of food-yelk, which is gradually used up.

The Evolution of Man — Volume 1 Ernst Heinrich Philipp August Haeckel 1876

In the upper part of the yelk is the transparent round germinal vesicle, which corresponds to the nucleus.

The Evolution of Man — Volume 1 Ernst Heinrich Philipp August Haeckel 1876

But while in the ova with discoid gastrulation the formative yelk is not in the centre, but at one pole of the uni-axial ovum, and the food-yelk gathered at the other pole, in the ova with superficial cleavage we find the formative yelk spread over the whole surface of the ovum; it encloses spherically the food-yelk, which is accumulated in the middle of the ova.

The Evolution of Man — Volume 1 Ernst Heinrich Philipp August Haeckel 1876

From the tread a thin column of the white yelk penetrates through the yellow yelk to the centre of the globular cell, where it swells into a small, central globule (wrongly called the yelk-cavity, or latebra, Figure 1.15 d apostrophe).

The Evolution of Man — Volume 1 Ernst Heinrich Philipp August Haeckel 1876

The remains of the yelk, which have not yet been applied to the nutrition and growth of the young animal, are contained in a sac attached to the rudimentary intestine, and termed the yelk sac, or 'umbilical vesicle.'

On the Relations of Man to the Lower Animals Thomas Henry Huxley 1860

The remains of the yelk, which have not yet been applied to the nutrition and growth of the young animal, are contained in a sac attached to the rudimentary intestine, and termed the yelk sac, or

Lectures and Essays Thomas Henry Huxley 1860