The said doctor tested the way of birth of a frog from those...
The said doctor tested the way of birth of a frog from those eggs which were not inseminated and came to this conclusion that amongst the eggs some remain alive for a long period while some die very soon. This incident induced Doctor Jack to conduct once again this test on a frog and consequently succeeded in keeping alive these parts too for a long time. Later Doctor Wern Luis and his wife proved that it is possible to keep the parts of a bird's foetus in salt-water and allowing them to live.
When some organic substance is added to it, the said parts tend to grow and multiply. Successive tests have revealed that it is possible for the parts of any animal which is kept in salt-water to remain alive and grow provided they are given food. However it is still not known whether those parts remain alive or not after turning old. Afterwards, Doctor Carell embarked on further tests and proved that these parts do not bring senility in an animal.
Rather the life - span of these parts is more than the normal life-span of the animal itself. The said doctor started his experiment in the year 1912 and on this path faced many problems until he and his assistants finally succeeded in proving the following points: (1) The afore-said parts remain alive constantly provided they do not encounter certain occurrences which destroy them like deficiency in food and entry of some of the microbes.
(2) These parts not only remain alive but grow and multiply just as they grow and multiply inside an animal's body. (3) It is possible to know the measure of growth and increase of these parts and their relation with the nourishment given to them. (4) Time has no effect on them. That is to say, these parts do not turn old and weak through the passage of time. Rather, the slight effect of senility is not produced for them.
Moreover, these parts grow and multiply in the current year in the same manner, which they used to grow and multiply in the previous years. All these eternal things reveal that these parts grow and remain alive if proper care and food is provided to them. Therefore the main factor which causes death is in attentiveness and not senility. So, what is the cause of man's death? Why it is that man does not live for more than hundred years and rather lives normally for only seventy or eighty years??!
We may reply as such: An animal's body possesses numerous and diverse parts and these parts have strong connection with each, other.