23 Haziran 2010 Çarşamba

THE SHAPE OF CELLS REFUTES THE THEORY OF EVOLUTION



There are approximately 200 different types of cells in your body, yet they differ from one another in only the slightest of ways. One of the most important differences is shape. Although nerve cells, muscle cells, and blood cells all have the same basic DNA, it is thanks to their perfect individual shapes that they function with the utmost efficiency in the region of the body where they carry out their duties.


Two examples of cells with different shapes are nerve cells and blood cells. Nerve cells have long extensions, called axons, from the spinal cord to the feet that can reach up to one meter in length in humans. This way, when stimuli pass from one cell to another, there is no time lost. The impulses pass directly to where they are going.

Red blood cells, called erythrocytes, however, contrary to nerve cells, are only about 7-8 micrometers in diameter. The very fact of their being so tiny means that they penetrate the smallest of capillaries with ease, and without getting deformed. In addition, their biconcave shape maximizes the surface area across which oxygen is exchanged for carbon dioxide. If you consider that there are millions of these cells in one cubic millimeter of blood, it won't be hard for you to estimate the massive surface area on which this exchange of gases is carried out.

Cells in the eye and ear are also specialized in regards to shape. The cochlea, inside the inner ear, contains sensory cells which have hairlike projections that produce nerve impulses in response to sound vibrations in the middle ear. Somewhat similarly, light-sensitive cells of the retina in the eye have also been designed to perform their function in the best way possible. The cone cells in the retina contain many light-sensitive pigments, as well as a layer containing nerve connections. This organization gives the cone cells a very high sensitivity to light.

In the small intestine, too, there are nutrient-absorbing cells with the appropriate shape to perform their special functions. The lining of the small intestine is covered by millions of fingerlike projections called villi. On each villus are microvilli which are even tinier. The combination of these projections increases the surface area for digestion and absorption of nutrients. 

Never forget that all of the billions of cells in the human body came about from the division of just one original cell, which originated from the union of sperm and egg. To think that each of these cells chose their individual shapes and then somehow assumed the shape of a body is totally illogical. This all shows clearly that cells are created in the most efficient ways to carry out their functions. That is, they are created by God, the Possessor of infinite wisdom and intelligence.

Hiç yorum yok:

Yorum Gönder