The Functions of the Main Cell Components

942 WordsMar 12, 20134 Pages
P1 [pic] 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…show more content…
The non striated muscle controls slow, involuntary movements such as the contraction of the smooth muscle tissue in the walls of the stomach and intestines. The muscle of the arteries contracts and relaxes to regulate the blood pressure and the flow of blood. Cardiac muscle – The cardiac muscle tissue is only found in the walls of the heart. Cardiac muscle tissue shows some of the characteristics of smooth muscle and some of skeletal muscle tissue. The spaces between the different fibres of the cardiac muscle are filled with areola connective tissue which contains blood capillaries to supply the tissue with the oxygen and nutrients. Cardiac muscle tissue plays the most important role in the contraction of the atria and ventricles of the heart. It causes the rhythmical beating of the heart, circulating the blood and its contents throughout the body. [pic] There are two types of nervous tissue. Neurones - are nerve cells. They carry information as tiny electrical signals. There are three different types of neurones, each with a slightly different function. Sensory neurones carry signals from receptors to the spinal cord and brain. Relay neurones carry messages from one part of the CNS to another. Motor neurones carry signals from the CNS to effectors. Neuroglia - are cells that support and protect neurons. Astrocytes have numerous processes that give the cell a star-shaped
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