Essay about The Functions of the Main Cell Components

947 Words Mar 3rd, 2013 4 Pages

Cell membrane - encloses the contents of the cell and regulates the flow of substances into and out of the cell.

Mitochondrion - this feature produces a substance called adenosine triphosphate (ATP) which is the carrier of energy in all cells.

Centriole - these two features made of hollow tubules play a key role in cell division.

Ribosomes - these small, granular features of the cell play a key role in the assembly of proteins.

Chromosome - During cell division, DNA, the genetic material duplicates and forms linked coils called chromosomes.

Endoplasmic reticulum - this organelle helps to transport materials through the cell. Rough reticulum is the site of attachment for ribosomes; smooth reticulum is the site of
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Adipose - tissue is a form of loose connective tissue that stores fat.

Cartilage - is a form of fibrous connective tissue that is composed of closely packed collagenous fibres in a rubbery gelatinous substance called chondrin. The skeletons of sharks and human embryos are composed of cartilage. Cartilage also provides flexible support for certain structures in adult humans including the nose, trachea and ears.

Bone - is a type of mineralised connective tissue that contains collagen and calcium phosphate, a mineral crystal. Calcium phosphate gives bone its firmness.

Blood - is considered to be a type of connective tissue. Even though it has a different function in comparison to other connective tissues it does have an extracellular matrix. The matrix is the plasma and erythrocytes, leukocytes and platelets are suspended in the plasma.

There are 3 main types of muscle tissue.

The striated muscle - is attached to and brings about the movement of the various bones of the skeleton. The whole muscle, such as the biceps, is enclosed in a sheath of connective tissue, the epimysium. Striated muscles function in pairs to bring about the co-ordinated movements of the limbs, jaws, eyeballs, etc. It is directly liked to the breathing process.

The non striated muscle - is involuntary. It is made up of thin-elongated muscle cells, fibres. These fibres are pointed at their ends and each has a single, large, oval

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