Cell : Structure of cell .
Cell :
The cell is the functional and formation unit of animals. Every animals makes with only one to millions or trillions cell. All vital importance things are held in cell. Even a cell individualy can alive. That's why you can say to a cell is a animal. Some Bacterias and virus can alive individualy although they have only one cell. At first zoologist Robert hook discovered the cell. Animal cell made with plasma membrane, cytoplasm, nucleus, mitochondria, microbiuls, ribosom, lisosom, endoplasomic reticulam, Cell cavity etc.
The plasma membrane protect cell from osmotic pressure and save all cellular things. Cytoplasm is the liquid media of cell. All micro elements of cell are stay at here. Every cell have a neucleous. Neucleous contain genetic things. On the others hand cell contain may mitochondria and it's known as power house of cell.
Cell can be two kinds depend on their structure. Like as.....
1. Eukaryotic cell
And
2. Prokaryotic cell.
The cell is the functional and formation unit of animals. Every animals makes with only one to millions or trillions cell. All vital importance things are held in cell. Even a cell individualy can alive. That's why you can say to a cell is a animal. Some Bacterias and virus can alive individualy although they have only one cell. At first zoologist Robert hook discovered the cell. Animal cell made with plasma membrane, cytoplasm, nucleus, mitochondria, microbiuls, ribosom, lisosom, endoplasomic reticulam, Cell cavity etc.
The plasma membrane protect cell from osmotic pressure and save all cellular things. Cytoplasm is the liquid media of cell. All micro elements of cell are stay at here. Every cell have a neucleous. Neucleous contain genetic things. On the others hand cell contain may mitochondria and it's known as power house of cell.
Cell can be two kinds depend on their structure. Like as.....
1. Eukaryotic cell
And
2. Prokaryotic cell.
cell was discovered by Robert Hooke in
ReplyDelete1665, who named the biological unit for its
resemblance to cells inhabited by Christian
monks in a monastery. [5][6] Cell theory, first
developed in 1839 by Matthias Jakob
Schleiden and Theodor Schwann , states that
all organisms are composed of one or more
cells, that cells are the fundamental unit of
structure and function in all living organisms,
that all cells come from preexisting cells, and
that all cells contain the hereditary
information necessary for regulating cell
functions and for transmitting information to
the next generation of cells. [7] Cells emerged
on Earth at least 3.5 billion years ago. [
Thank you
ReplyDeletePlants, animals, fungi, slime moulds, protozoa, and algae are all eukaryotic. These cells are about fifteen times wider than a typical prokaryote and can be as much as a thousand times greater in volume. The main distinguishing feature of eukaryotes as compared to prokaryotes is compartmentalization: the presence of membrane-bound organelles (compartments) in which specific metabolic activities take place. Most important among these is a cell nucleus, an organelle that houses the cell's DNA. This nucleus gives the eukaryote its name, which means "true kernel (nucleus)". Other differences include:
ReplyDeleteThe plasma membrane resembles that of prokaryotes in function, with minor differences in the setup. Cell walls may or may not be present.
The eukaryotic DNA is organized in one or more linear molecules, called chromosomes, which are associated with histone proteins. All chromosomal DNA is stored in the cell nucleus, separated from the cytoplasm by a membrane. Some eukaryotic organelles such as mitochondria also contain some DNA.
Many eukaryotic cells are ciliated with primary cilia. Primary cilia play important roles in chemosensation, mechanosensation, and thermosensation. Cilia may thus be "viewed as a sensory cellular antennae that coordinates a large number of cellular signaling pathways, sometimes coupling the signaling to ciliary motility or alternatively to cell division and differentiation.
The cell membrane, or plasma membrane, is a biological membrane that surrounds the cytoplasm of a cell. In animals, the plasma membrane is the outer boundary of the cell, while in plants and prokaryotes it is usually covered by a cell wall. This membrane serves to separate and protect a cell from its surrounding environment and is made mostly from a double layer of phospholipids, which are amphiphilic (partly hydrophobic and partly hydrophilic). Hence, the layer is called a phospholipid bilayer, or sometimes a fluid mosaic membrane. Embedded within this membrane is a variety of protein molecules that act as channels and pumps that move different molecules into and out of the cell. The membrane is said to be 'semi-permeable', in that it can either let a substance (molecule or ion) pass through freely, pass through to a limited extent or not pass through at all. Cell surface membranes also contain receptor proteins that allow cells to detect external signaling molecules such as hormones.
ReplyDeleteThe cell membrane, or plasma membrane, is a biological membrane that surrounds the cytoplasm of a cell. In animals, the plasma membrane is the outer boundary of the cell, while in plants and prokaryotes it is usually covered by a cell wall. This membrane serves to separate and protect a cell from its surrounding environment and is made mostly from a double layer of phospholipids, which are amphiphilic (partly hydrophobic and partly hydrophilic). Hence, the layer is called a phospholipid bilayer, or sometimes a fluid mosaic membrane. Embedded within this membrane is a variety of protein molecules that act as channels and pumps that move different molecules into and out of the cell. The membrane is said to be 'semi-permeable', in that it can either let a substance (molecule or ion) pass through freely, pass through to a limited extent or not pass through at all. Cell surface membranes also contain receptor proteins that allow cells to detect external signaling molecules such as hormones.
ReplyDeletePlants, animals, fungi, slime moulds, protozoa, and algae are all eukaryotic. These cells are about fifteen times wider than a typical prokaryote and can be as much as a thousand times greater in volume. The main distinguishing feature of eukaryotes as compared to prokaryotes is compartmentalization: the presence of membrane-bound organelles (compartments) in which specific metabolic activities take place. Most important among these is a cell nucleus, an organelle that houses the cell's DNA. This nucleus gives the eukaryote its name, which means "true kernel (nucleus)". Other differences include:
ReplyDeleteThat's very good.
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