This was Lamarck's idea. Here's an example: Suppose giraffes originally had short necks that they stretched to reach high-up leaves in the trees. This continuous stretching of the neck was passed onto offspring, who as a result had slightly longer necks. This continued for multiple generations until we get today's long-necked giraffe. Lamarck was on to something (that something being evolution by natural selection, which Darwin discovered), but his theory wasn't completely correct since organisms can only pass on genes (segments of DNA that code for a characteristic or function) to their offspring. Since "stretching" would not code into DNA, it wouldn't be passed onto offspring, proving Lamarck's theory incorrect.
<span>The function of red blood cells in the
body is to transport oxygen from the lungs to the tissues. </span><span><span>Red blood cells </span>produce a protein called hemoglobin, which absorbs oxygen from the
lungs. Hemoglobin is also what gives blood its color. The function of white blood cells is to defend the body from various infections.
Hope this helps.
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The vas deferens transport sperm from the testicle to the urethra.