The false bladder of the fishes is a mesodermic product of the nephroducts; the true bladder of the Dipneusts, Amphibia, and Amniotes is an entodermic blind sac of the rectum.
The sexual glands develop originally from the two promesoblasts or primitive mesodermic cells (Figure 1.
Groups of sensitive nerve cells separate from the ordinary epidermic cells; they retire into the more protected tissue of the mesodermic under-skin, and form special neural ganglia there.
On the other hand, all the membranous, cartilaginous, and osseous coverings of the labyrinth are formed from the mesodermic head-plates.
The various parts of the corium arise by division of labour from the originally homogeneous cells of the cutis-plate, the outermost lamina of the mesodermic skin-fibre layer (Figure 1.
A pair of longitudinal mesodermic tendons, which may have been formed originally out of a number of segmentally arranged mesodermic tendons, and are crossed by the fibrils of the transverse muscular bundles.
The number increases as the embryo grows and extends backwards, and new cells are formed constantly (at the primitive mouth) from the two primitive mesodermic cells (Figures 1.
The recent investigations of Ruckert and Van Wijhe on the mesodermic segments of the trunk and the excretory system of the selachii show that these "primitive fishes" are closely related to the amphioxus in this further respect.
Therefore, if the phenomenon is considered in its simplest expression, inflammation is merely a reaction of the mesodermic cells against an external agent.
As he studied these phenomena more closely, he ascertained that mesodermic cells accumulated around grains of carmine introduced into the organism.
Metchnikoff then reasoned as follows: In man, microbes are usually the cause which provokes inflammation; therefore it is against those intruders that the mobile mesodermic cells have to strive.
There, Metchnikoff wrote his first memoir on the reaction of inflammation and on the digestion of microbes by the mesodermic cells of lower invertebrates.
Then, by a comparative study in every grade of the animal kingdom, he proved that the same mode of struggle and defence persists in the mesodermic cells, the phagocytes in all animals in general.
In 1879, at Naples and at Messina, he was able to establish the fact that the mesodermic cells of many larvae of Echinodermata and Coelenterata, endowed with a digestive tube, nevertheless contained strange bodies.
He had observed in Echinoderma that, during the transformation of their larvae, the parts becoming atrophied were englobed by mesodermic mobile cells.
Inflammation is thus a curative reaction of the organism, and morbid symptoms are no other than the signs of the struggle between the mesodermic cells and the microbes.
Even when the cavity is developed in these inferior animals, the digestive functions are fulfilled by the mesodermic cells.
The white blood corpuscles, or leucocytes, which constitute pus, are mobile mesodermic cells.
The study of medusae and of their mesodermic digestion confirmed him more and more in the conviction that the mesoderm was a vestige of elements with a primitive digestive function.
In order to verify these conjectures, he started studying the englobing of microbes by mesodermic cells in larvae and in other marine invertebrates which he inoculated.
This mesodermic epithelium lining the coelom is called the mesothelium.
When the hepatic outgrowth buds from the duodenum the vitelline veins send out branches which break up into a wide-meshed capillary network in the mesodermic tissue enveloping the hepatic cylinders.
The word "rib" may designate this mesodermic portion.
The mesodermic portion of the organism in which the urinogenital system has its origin develops later than the ectodermic or the endodermic portions.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "mesodermic" in a variety of sentences. We hope that you will now be able to make sentences using this word.
