somite

A somite is a division of the body of an animal.

The first thoracic somite is too short to be seen from above, the second is longer.

Each somite had in turn a pair of uniramous, segmented legs.

A sclerotome is part of a somite, a structure in vertebrate embryonic development.

Notch regulates Hairy1, which sets up the caudal half of the somite.

In mammals, secondary neurulation begins around the 35th somite.

The labium, when present, is a flattened plate derived from the somite of the first walking leg.

But what specifies just which cells will form an adhesive block separating each somite from its neighbours is not known.

The 2nd somite bears four black processes, two subdorsally and two laterally.

The outer cells undergo a mesenchymal-epithelial transition to form an epithelium around each somite.

The prosoma and opisthosoma are connected by the pedicle, or pregenital somite.

The major source of these cells are sclerotome and somite mesenchyme as well as primitive streak.

The openings of the respiratory system, the spiracles or stigmata, are located on the sides of the second somite.

In crustacean biology, a somite is a segment of the hypothetical primitive crustacean body plan.

Many kinds of tissue derive from the segmented paraxial mesoderm by means of the somite.

From their initial location within the somite, the sclerotome cells migrate medially towards the notochord.

Instead, it begins approximately at the level of the fourth somite at Carnegie stage 9 (around Embryonic day 20 in humans).

There are a number of events that occur in order to propel the specification of muscle cells in the somite.

In contrast, the cells within each somite retain plasticity (the ability to form any kind of structure) until relatively late in somitic development.

Their larval development is metamorphic, and the embryos are carried in paired or single sacs attached to first abdominal somite.

The cells within each somite are specified based on their location within the somite.

It is reddish-brown in colour, with a dark brown spot in the centre of each abdominal somite, although this is not sharply defined.

Therefore asymmetric somite formation correlates with a left-right desynchronization of the segmentation oscillations.

The shell around each somite can be divided into a dorsal tergum, ventral sternum and a lateral pleuron.