Regeneration

In the preceding chapters certain matters had to be taken for granted, since it was not possible, or desirable, at the time to discuss more fully some of the terms that are in c...

The comparatively few cases in animals in which regeneration has been shown to be influenced by external factors have been given in the preceding chapter. In all other cases tha...

By uniting parts of the same or different animals, or of plants, there is given an opportunity of studying a number of important problems connected with the regeneration of the...

There are many difficulties in the way of determining the origin of the cells that make up the new part. The only means at present at our command for studying their source is by...

Not only do adult organisms have the power of regeneration, but embryos and larval forms possess the same power, and even portions of the segmenting, and also the unsegmented, e...

The experimental work that Pflüger carried out in 1883 on the effect of gravity on the cleavage of the frog’s egg, and the conclusions that he drew from his experiments, mark th...

The series of experiments that Vöchting has carried out on the regeneration of the higher plants are so much more complete than all previous experiments, and his analysis of the...

It is significant to find that the theory of pre-formation of the embryo in the egg, that was so very widely held during the seventeenth and eighteenth centuries, and during the...

There is a widespread belief amongst zoologists that a definite relation exists between the liability of an animal to injury and its power of regeneration. It is also supposed t...

Although a few cases of regeneration were spoken of by Aristotle and by Pliny, the subject first attracted general attention through the remarkable observations and experiments...

Self-division, as a means of propagation, is of widespread occurrence in the animal kingdom. In some cases the animal simply breaks into pieces and subsequently regeneration tak...

It is a more or less arbitrary distinction to speak of internal in contrast to external organs, since the latter contain internal parts; but the distinction is, for our present...

During the normal life of an individual many of the tissues of the body are being continuously renewed, or replaced at definite periods. The replacement of a part may go on by a...

There is a constant interchange of material and of energy that takes place between a plant or an animal and its surroundings, and this interchange may be influenced by such phys...

Theories of Isotropy and of Totipotence of Cells 242 Theory of Qualitative Division of Nucleus 243 Theory of Equivalency of Cells 244 Theory of the Organized Structure of the Pr...

Polarity and Heteromorphosis 38 Lateral Regeneration 43 Regeneration from an Oblique Surface 44 The Influence of Internal Organs at the Cut-surface 52 The Influence of the Amoun...

Examples of Grafting in Hydra, Tubularia, Planarians, Earthworms, Tadpoles 159 Grafting Pieces of Organs in Other Parts of the Body in Higher Animals 178 Grafting of Parts of Em...

Origin of New Cells in Annelids 190 Origin of the New Lens in the Eye of Salamanders 203 The Part played by the “Germ-layers” in Regeneration 207 The Supposed Repetition of Phyl...

The Effect of Temperature 26 The Effect of Food 27 The Effect of Light 29 The Effect of Gravity 30 The Effect of Contact 33 The Effect of Chemical Changes in the Environment 35...

Review of Groups in which Self-division occurs 142 Division in Plane of Least Resistance 144 Review of Groups in which Budding occurs. Relation of Budding+ to Regeneration 149 A...

Organization 277 Machine Theory of Development and of Regeneration 283 Teleology 283 “Action at a Distance” 284 Definition of Terms: Cause, Stimulus, Factor, Force, Formative Fo...

Examples of Supposed Connection between Regeneration and Liability to Injury 92 Regeneration in Different Parts of the Body 97 Regeneration throughout the Animal Kingdom 103 Reg...