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The Human Cell 101 - Simple to understand

The Human Cell 101

Cell Parts

 

      Differing in size, shape, and function, the cell is the smallest functional unit of tissues and organs - Each cell is somewhat self-contained and self-maintaining:

 

-       It can take in nutrients, convert these nutrients into energy, carry out specialized functions, and reproduce

 

-       Human cells have a surrounding protective membrane - enclosing a salty, watery cytoplasm in which is floating a set of membrane-bound organelles ("little organs"), which perform a number of vital functions for the cell.

 

For example:

 

         The cell nucleus houses DNA - the cell’s genetic blueprint containing the building instructions for various protein molecules, such as enzymes;

 

         The mitochondrion -  produces power for the cell; the number of mitochondria / cell varies widely with tissue type E.g. red blood cells have none, whereas liver and muscle cells may contain hundreds, even thousands; unique to the organelles, the mitochondrion has two distinct membranes

  

         The endoplasmic reticulum - is the transport network for active molecules;

 

         Ribosome – primary site of protein synthesis

 

         The Golgi complex  /apparatus  - is the cell’s central delivery system and a site for protein processing, packaging, and transport.

 

         Lysosome - contain enzymes that break down waste materials and cellular debris

 

         Centriole – two per cell;  help with mitosis and meisosis when cell divides.

 

  

 

THE HUMAN CELL LINKS

THE HUMAN CELL

Related Links

THE HUMAN CELL 101

Cell Parts  

Cell Membrane“The Cell’s Castle Guard”

-  How do substances cross cell membrane  

CELULAR RESPIRATION

Cellular Respiration