History of cell biology, Biology

HISTORY OF CELL BIOLOGY

Scientific knowledge grows with the development of new tools and techniques for studying various physical and biological processes. This is true also of the origin of the concept of cell as a basic unit of life. By 1800 A.D., good microscopes were developed and consequently plants and animals were found to be made up of small units, later known as 'cells'. However, it was only in 1838, that the cell theory was proposed. According to this theory, the cell is both the structural and the functional unit of all living organisms. Cell theory gave a great impetus to study of the cell. It was established that the cell is a mass of protoplasm limited by a cell membrane and possessing a nucleus. Another important observation was thatcells come only from pre-existing cells as a result of cell division. Details of cell division were soon worked out. It became apparent that mitosis is the formation of nuclear filaments (chromosomes) and their equal division between the daughter cells..It was also observed that organisms generally develop from the fusion of two sex cells, the spermatozoon (male sex cell) and ovum (female sex cell). In 1892, cytology (cyto = cell, logos = study) was established as a separate branch of biology. Study of cells with, electron microscope gave a new dimension to the study of cell. Detailed morphological studies of the cell helped to relate the structure with furiction of cellular organelles.

Interaction between various branches of scientific enquiry leads to their overall growth. The interaction between cytology and genetics on one hand and between physiology and biochemistry on the other gave rise to a more comprehensive discipline, Cell Biology, which embodies all that should be known about the cell.

791_Untitled.jpg

Posted Date: 12/8/2012 7:35:17 AM | Location : United States







Related Discussions:- History of cell biology, Assignment Help, Ask Question on History of cell biology, Get Answer, Expert's Help, History of cell biology Discussions

Write discussion on History of cell biology
Your posts are moderated
Related Questions

what is the excretory system of a crab?

Q. What do you mean by Hemichordata ? Hemichordates re vermiform (worm-like) animals which have few characters like those of the chordates, hence the name hemichordata (hemi :

Q. What do you mean by Pericardium? Pericardium is the sac covering the heart. Pericardium consists of two layers-the visceral pericardium (epicardium) and the parietal pericar

The systems of your body are capable of performing specialized functions that keep you alive and enable you to reproduce. In a very general kind of way, a cell is also capable of p

Define Historical example of management of renewable resources? There are fundamental and well developed applications of mathematical and quantitative approaches to the managem

The heart is enclosed in a membranous sac called the pericardium. It has two layers- the fibrous pericardium which is the outer layer and the serous pericardium that lies inside th

Q. Which are the three hormones that participate in the regulation of the renal function? Antidiuretic hormone or ADH or vasopressin, atrial natriuretic factor (or ANF) and ald


explain mitosis in detail