animal pole

This is true, except that each has a white blastodisc at the animal pole.

The roof of the evacuation zone at the animal pole is much thinner than before.

A dimple occurs at its apex, and marks the animal pole.

The egg contains a single micropylar opening located at the animal pole.

When viewed from the animal pole, this arrangement of cells displays a spiral pattern.

In many specimens, the blastoderm forms a peaked mound at the animal pole.

The cell cleavage is uneven, and mainly concentrated in the cytoplasma-rich animal pole.

The furrow first appears at the animal pole, and gradually extends to the edge of the blastodisc, which we now call the blastoderm.

The animal pole consists of small cells that divide rapidly, in contrast with the vegetal pole below it.

Through the process of radial extension, cells of the animal pole that were once several layers thick divide to from a thin layer.

The site where it is attached to the ovary is known as the animal pole and the other end the vegetal pole.

Ectodermin mRNA is maternally deposited in the animal pole of the egg.

With each successive cleavage cycle, the macromeres give rise to quartets of smaller micromeres at the animal pole.

In other words, the orientation of divisions that produces each quartet alternates between being clockwise and counterclockwise with respect to the animal pole.

The animal pole draws its name from its liveliness relative to the slowly developing vegetal pole.

The animal pole of the egg is a dark grey-brown while the vegetable pole is a creamy yellow-white.

The once superficial cells of the animal pole are destined to become the cells of the middle germ layer called the mesoderm.

In some cases, the animal pole is thought to differentiate into the later embryo itself, forming the three primary germ layers and participating in gastrulation.

The axis of symmetry passes through on one side the animal pole, and on the other side the vegetal pole.

Deep cells anterior to the future forebrain region begin to migrate away from the animal pole, producing an evacuation zone that is devoid of cells.

In developmental biology, an embryo is divided into two hemispheres: the animal pole and the vegetal pole within a blastula.

Polar proliferation - Cells at the polar ends of the blastula/gastrula proliferate, mostly at the animal pole.

Following this, the individual macromeres undergo a series of divisions which generate a string of micromeres at the animal pole of the embryo.

The evacuation zone is not visible in living specimens at this stage, and some deep cells still remain tightly attached to the ysl at the animal pole.

The yolky end of the egg (the vegetal pole) remains homogenous while the other end (the animal pole) undergoes cell division.