These tender embryos are, in the first place wrapped up with a compactness, which no art can imitate; in which state they compose what we call the bud.
Many of these trees (observe in particular the ash and the horse-chestnut) produce the embryos of the leaves and flowers in one year, and bring them to perfection the following.
A single otolith is present as in the veliger embryos of Opisthobranchia.
At one of the later lectures, after speaking about fifteen minutes, he invited his hearers to examine living salmon embryos under his direction at one table, and living shark embryos under mine at another.
Two embryos (twins) begin to develop in separate membranes or chorions.
Its very uniqueness would suggest that it may not be due to the ordinary causes of hermaphroditism, but might arise from some obscure and unusual cause such as the fusion of two embryos at a very early stage.
Amongst the true Ceratospongiae the embryos of two of the Aplysinidae, and of Spongelia and Euspongia have been to some extent worked out by Barrois and Schulze.
These, in the embryos of the Tubularian genera, lie some little way behind the apex of the body.
The embryos are attached by suspenders to the two cirri of the arms which immediately adjoin the mouth.
As has already been stated, it is probable that the infusoriform embryos leave the renal organs of their host and lead a free existence.
These embryos pass directly into the parent form without metamorphosis.
In Limax embryos Gegenbaur found a pair of elongated provisional branched renal sacks, the walls of which contained concretions.
The male embryos are more elongated than the female, from which they further differ in only having six segments.
The two embryosare at first united by an epiblast cord which connects their necks (fig.
Von Baer was mistaken in thus absolutely limiting the generalization, but his statement is much more nearly true than a definite statement of the exact similarity of the embryos of higher forms to the adults of lower ones.
It rapidly grows larger and becomes a paired pyriform gland, in which are secreted the byssus threads which serve to attach all the embryos at a common point to the walls of the brood-pouch.
He reared gastrulae and older embryoswith notochord and nerve-tube, which were perfect and normal, except in size.
Roux tried to give experimental evidence in favour of his mosaic theory in a treatise On the Artificial Productions of Half-Embryos by the Destruction of one of the first two Cleavage-Cells, and on the Reconstruction of the Lost Parts.
The developmental history of double monsters enforces the same doctrine; such are common among the embryos of fish, and rather less common among chicks.
The embryosproduced by these worms enter the blood vessels.
Railliet and others have recently recommended the application of lime to fluky pastures, having discovered that very weak solutions are destructive not only to fluke embryos but to snails.
In two weeks to a month after the embryos are swallowed they reach maturity and begin producing eggs.
She preferred to oviposit into eggs about 2 weeks old, although she would place eggs in oothecae less than a week old and in embryos in the green band stage.
All eggs are consumed when the parasite density is high, but if too few larvae develop per ootheca, some cockroach eggs survive and the embryos complete development (Roth and Willis, 1954b).
The embryos grow within the egg very slowly for about two months before they are hatched; while fecundated eggs of some other families which spawn in spring and summer, give birth to young fishes a few days after they are laid.
Furthermore, it explains why "all species of animals produce many more eggs or embryos than are necessary to propagate their kind and to provide for a normal increase.
If their food should contain eggs of parasites, or if the waters in which they swim should contain eggs or embryos of parasites, they would be continually exposed to infection, with no chance for a vacation trip for recuperation.
In the lower fishes, as in the earlier sharks, there is an approach to this condition of primitive continuity, and in the embryos of almost all fishes the same condition occurs.
Embryos of Heterodontus japonicus Maclay and Macleay, a Cestraciont shark, showing the backward migration of the gill-arches and the forward movement of the pectoral fin.
In the more primitive forms, and probably in the embryos of all species, the air-bladder is joined to the oesophagus by an air-duct.
The earlyembryos are shark-like; and the later ones have, as T.
The importance, therefore, of arresting the development of as many embryos as possible is at once apparent.
From more recent observations it is probable that abdominal appendages are usually present in the embryos of Orthoptera, Coleoptera, Lepidoptera, and possibly Hymenoptera.
It costs some pains to find an accessible place in which the females regularly lay their eggs, and the opaque capsule renders it hard to tell in what stage of growth the contained embryos will be found.
Eight embryos in one row face eight others on the opposite side, being alternated for close packing.
The ripe embryos are said by Westwood to discharge a fluid (saliva?
In one state of the ovary this principle may cause the embryosto become workers, in another males.
From hence it should seem to follow, that the former kind of eggs are first in the oviducts, and, if impregnation be not effected within a given time, that all the worker embryos perish.
Beyond strewing clean shells on these private beds, no provision is made to collect the swimming embryos during the spawning season, and multitudes must be carried away and lost.
Artificial fertilization and the rearing of the embryosin the laboratory largely eliminate these dangers.
Warren as seeing a weasel dragging a freshly killed, still warm, rabbit that contained nine embryos almost ready for birth.
After a long period of quiescence lasting for several months, the embryos resulting from these matings become active in early spring and develop to full term in less than 27 days after they become implanted.
In the preceding part of the "long gestation period, the embryos lie dormant in the uterus as un-implanted blastocysts.
One specimen had two embryos (each 30 millimeters long in crown-rump measurement) and each of the other specimens contained one embryo.
They are termed the "branchial clefts," and are seen in the embryos of all vertebrates.
In other words the germ-plasm from which individuals spring is of such a nature that the embryos arising from it show in their development a recapitulation of the evolution of their particular species.
At approximately 35 days the eggs became dark red; embryonic structures were discernible thereafter only in eggs that had embryos situated at one end, close to the shell.
When the eggs were removed from the refrigerator they showed gains in weight and increases in size comparable to eggs, containing embryos of the same age, used as controls.
Some embryos could be seen spasmodically thrusting the head and neck dorsally against the shell.
Embryos at fifteen days, measured in a straight line from cephalic flexure to posteriormost portion of body, were approximately nine to ten millimeters long and at 22 days were 14 millimeters long.
The embryos in two of the eggs (one and 27 days old at the time of immersion) were still living ten days after the eggs were removed from the water; the embryo in the remaining egg (21 days old at the time of immersion) was dead.
Heart beats were observed in most embryos by the fifteenth day but were evident in a few as early as the tenth day.
Three of the females had 2 embryos each, two had 3 embryos each and one had only 1 embryo.
Of females with embryos two were captured in April and one in September.
When the eggs in these capsules hatch, the crowd of embryos proceed to establish an internecine warfare, devouring one another till only the strongest survives!
Perfect embryos and normal individuals are produced under these conditions.
Notations concerning lactation and embryos on specimen labels of females suggest that the southern pygmy mouse breeds in all months.
Forty-one records of embryosor young per litter average 2.
The average of 26 counts of embryos or young per litter is 2.
But if we compare the much more developed embryos on Plates II.
For the embryos of the different skulled animals (at least the three higher classes of them, the reptiles, birds and mammals) cannot be in any way distinguished at the stage represented in Fig.
In human embryos it can now be pointed out at any moment.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "embryos" in a variety of sentences. We hope that you will now be able to make sentences using this word.
