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                                     CELL BIOLOGY  ALL VIDEOS LECTURE

Cell biology

is the study of cell structure and function, and it revolves around the concept that the cell is the fundamental unit of life. Focusing on the cell permits a detailed understanding of the tissues and organisms that cells compose.

Robert Hooke’s initial observation in 1665 of plant-cell walls in slices of cork .

looking first at animal cells — provided the first clearly stated definition of the cell.

As microscopes and staining techniques improved over the nineteenth and twentieth centuries, scientists were able to see more and more internal detail within cells. The microscopes used by van Leeuwenhoek probably magnified specimens a few hundredfolds.

These improved imaging techniques:-

have helped us better understand the wonderful complexity of cells and the structures they form.

There are several main subfields within cell biology.

One is the study of cell energy and the biochemical mechanisms that support cell metabolism.

As cells are machines unto themselves,

the focus on cell energy overlaps with the pursuit of questions of how energy first arose in original primordial cells, billions of years ago.

Cutting across many biological disciplines is the additional subfield of cell biology,

concerned with :-

cell communication and signaling, concentrating on the messages that cells give to and receive from other cells and themselves.

there is the subfield primarily concerned with the cell cycle, the rotation of phases

beginning and ending with cell division and focused on different periods of growth and DNA replication.

Many cell biologists dwell at the intersection of two or more of these subfields as our ability to analyze cells in more complex ways expands.

In line with continually increasing interdisciplinary study, the recent emergence of systems biologhas affected many biological disciplines;

it is a methodology that encourages the analysis of living systems within the context of other systems.

evolutionary relationships between genomes, and the interactions between intracellular signaling networks.

Ultimately, the broader a lens we take on our discoveries in cell biology, the more likely we can decipher the complexities of all living systems, large and small.



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