CELLS AND DNA --- The body contains trillions to cells not all parts of the body are made free cells. Cells in the body function because of DNA sits within two nucleas of the cells. Here, parts of the DNA are copied and sent to the body of the cell via RNA.
The RNA is then used to create proteins which from the basis for the cells, their activity, and their products. Proteins dictate the cell function and gene expression. A ce is able to self regular by the amount of protein produced. However not all cell have DNA some cells such as mature red blood cells lose their nucleus as they mature.
TISSUES --- The. Body consists of many different types of tissue, defined as cells that act with a specialised function. The study of tissues, is called histology and often occurs with a microscope. The body consists of four main types of tissues lining cell, connective tissues, nervous tissues and muscle tissues.
SHAPE AND FORMS OF TISSUES --- From single layers of flat cells, to cells, to cells with small beating hair like cilia in the lumgs, to column like cell that line the stomach. ORGANS --- organs, structured collections of cell with a specific function. within the body example include the heart, lungz and liver. many organ reside within cavities within to body.
TISSUES --- The. Body consists of many different types of tissue, defined as cells that act with a specialised function. The study of tissues, is called histology and often occurs with a microscope. The body consists of four main types of tissues lining cell, connective tissues, nervous tissues and muscle tissues.
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