United States or Djibouti ? Vote for the TOP Country of the Week !
Microscopists of a few years ago began to suggest that the cells are in reality not separated from each other, but are all connected by protoplasmic fibres. In quite a number of different kinds of tissue it has been determined that fine threads of protoplasmic material lead from one cell to another in such a way that the cells are in vital connection.
We are thus brought to recognize, not only the continuity taught by organic evolution, but also the uniformity of the materials constituting the entire sensible world, inasmuch as the ultimate unit of all nervous phenomena is the reflex act of a protoplasmic mass, which itself is a synthesis of properties inhering in the chemical elements making up living matter.
Yes, I think we can. But I do not know that we can." Non-partyism may well be the protoplasmic stage of the future political opposition of the peasants. I have done my best to indicate the essential facts in Russia's problem today, and to describe the organization and methods with which she is attempting its solution.
Spectators with sufficient time on their hands to permit them to stand and watch were enabled to witness a New York mid-day meal in every stage of its career, from its protoplasmic beginnings as a stream of yellowish-white liquid poured on top of the stove to its ultimate Nirvana in the interior of the luncher in the form of an appetising cake.
It is absolutely certain that it required a real Creation to produce life from the not-living at all; and it is just as reasonable that this exercise of creative power may have taken place in all parts of the earth at the same general time, as the Bible teaches. For if a Being saw fit to create life at all, why should He stop with one or two bits of protoplasmic units?
When we carry back the analysis of an organized body as far as we can, we find every part of it made up of masses of nucleated protoplasm of various sizes and shapes. In all essential features these masses conform to the type of protoplasmic matter just described. Such bodies are called cells.
In brief, then, a cell is a mass of nucleated protoplasm; the nucleus may have a nucleolus, and the cell may be limited by a cell wall. Every tissue of the human body is formed through the agency of protoplasmic cells, although in most cases the changes they undergo are so great that little evidence remains of their existence.
We will not go into the very complicated details of the actual process of the growth and division of the protoplasmic cells. It is enough to say that in the case of living creatures provided with more complicated organisms, such as the higher plants, animals and man, the little cell units divide and grow as they do in the case of the lower organisms.
This internecine war must continue while any creature great or small shall remain alive upon the world that bore it. "By slow degrees the mighty milestones in the protoplasmic march are passed. Plants and animals are now busy, murdering and devouring each other the strong everywhere destroying the weak. New types appear. Old types disappear.
Since then our knowledge of the formation and history of these cells has been continually growing. The size of cells varies, but as a rule they are very minute. They consist of what is termed protoplasm. At one time it was supposed that protoplasm was structureless. Now it is known that the protoplasmic cell contains a nucleus and a surrounding body.
Word Of The Day