Embryology in the Quran: Difference between revisions

Jump to navigation Jump to search
[checked revision][checked revision]
No edit summary
Line 11: Line 11:


==Summary of the Main Errors in Qur'anic Embryology==
==Summary of the Main Errors in Qur'anic Embryology==
The author of the Qur'an imagined a sequence of stages, which when examined without the false definitions and arbitrary assumptions made by apologists, clearly has no resemblance to the actual development process of a child in the womb. Someone with a modern, scientific knowledge of embryology can instead marvel at the exquisite complexity that results from a process of co-ordinated cell differentiation and signalling, encoded in our genetic instruction set by millions of years of evolution.


The main errors can be summarised as follows and are further discussed in the rest of this article.
The main errors can be summarised as follows and are further discussed in the rest of this article.
Line 23: Line 21:


'''3).''' Bones are formed before being clothed with flesh. In fact cartilage models of the bones start to form at the same time as and in parallel with surrounding muscles, and this cartilage is literally replaced with bone.
'''3).''' Bones are formed before being clothed with flesh. In fact cartilage models of the bones start to form at the same time as and in parallel with surrounding muscles, and this cartilage is literally replaced with bone.
The author of the Qur'an imagined a sequence of stages, which when examined without the false definitions and arbitrary assumptions made by apologists, clearly has no resemblance to the actual development process of a child in the womb. Someone with a modern, scientific knowledge of embryology can instead marvel at the exquisite complexity that results from a process of co-ordinated cell differentiation and signalling, encoded in our genetic instruction set by millions of years of evolution.


==Analysis==  
==Analysis==  
Line 166: Line 166:
In order to compare with science the Qur'anic statement that Allah makes 'ithaman (bones<ref name="LLitham"></ref>) and then clothes (fa-kasawna<ref name="LLkasawa"></ref>) the bones with lahman (flesh<ref name="LLlahm"></ref>), first we should see what science has discovered about the process of bone and muscle formation. Here is a brief description for both of them, without any detail on the relative timing of parallel processes. The section that follows afterwards contains numerous cited scientific sources stating the timing of these processes.
In order to compare with science the Qur'anic statement that Allah makes 'ithaman (bones<ref name="LLitham"></ref>) and then clothes (fa-kasawna<ref name="LLkasawa"></ref>) the bones with lahman (flesh<ref name="LLlahm"></ref>), first we should see what science has discovered about the process of bone and muscle formation. Here is a brief description for both of them, without any detail on the relative timing of parallel processes. The section that follows afterwards contains numerous cited scientific sources stating the timing of these processes.


Mesoderm is the middle of the three layers of the early embryo. Some of the mesoderm cells form a series of blocks called somites either side of the neural tube (this tube will eventually form the spinal cord and brain). These somites will differentiate into sclerotome and myotome, which form the cartilage 'models' (or 'templates') and become connective tissues (including muscles) respectively of the future axial skeleton (i.e. everything except the limbs, shoulders and pelvis). The myotome differentiates and migrates as the sclerotome is condensing into mesenchyme, which will form cartilage. Each process occurs segmentally down the somites in a cranio-caudal sequence (head to tail).
Mesoderm is the middle of the three layers of the early embryo. Some of the mesoderm cells form a series of blocks called somites either side of the neural tube (this tube will eventually form the spinal cord and brain). These somites will differentiate into sclerotome and myotome, which form the cartilage 'models' (or 'templates') and become connective tissues (including muscles) respectively of the future axial skeleton (i.e. everything except the limbs, shoulders and pelvis). The myotome differentiates and migrates as the sclerotome is condensing into mesenchyme, which will produce cartilage. Each process occurs segmentally down the somites in a cranio-caudal sequence (head to tail).


Another area of mesoderm (lateral plate mesoderm) proliferates especially quickly in certain positions to form the limb buds. There, mesenchyme cells condense into distinct masses within the limb buds. These mesenchyme cells differentiate into chondrocytes, which produce cartilage. Cartilage models of the future limb bones gradually form (chondrification). Once the cartilage models have formed and while they are still growing, the cartilage is literally replaced with actual bone by osteoblasts (ossification) working outwards from centres of the cartilage models. Osteoclasts remove the remnants of the mineralized cartilage. Ossification also starts in the axial skeleton some time after it has begun in the limbs, except for the upper and lower jaw, which start to ossify slightly earlier.
Another area of mesoderm (lateral plate mesoderm) proliferates especially quickly in certain positions to form the limb buds. There, mesenchyme cells condense into distinct masses within the limb buds. These mesenchyme cells differentiate into chondrocytes, which secrete the cartilage matrix and are embedded in it. Thus cartilage models of the future limb bones gradually form (chondrification). Once the cartilage models have formed and while they are still growing, the cartilage is literally replaced with actual bone by osteoblasts (ossification) working outwards from centres of the cartilage models. Osteoclasts remove the remnants of the mineralized cartilage. Ossification also starts in the axial skeleton some time after it has begun in the limbs, except for the upper and lower jaw, which start to ossify slightly earlier.


Meanwhile, the process of limb muscle formation begins as soon as the limb buds appear. Myoblast cells migrate from somites to populate the limb buds. They aggregate into distinct masses, differentiating and fusing into muscle fibres, as the condensing mesenchyme starts to chondrify, and before the resulting cartilage models begin to ossify.  
Meanwhile, the process of limb muscle formation begins as soon as the limb buds appear. Myoblast cells migrate from somites to populate the limb buds. They aggregate into distinct masses, differentiating and fusing into muscle fibres, as the condensing mesenchyme starts to chondrify, and before the resulting cartilage models begin to ossify.  
Line 198: Line 198:
Even if we were to accept that the Qur'an was only referring to precursors of bone and not bone itself, even though it used the Arabic word for bone ('itham), and not cartilage (ghurdoof), the embryology is still wrong. Even if, with further and unjustifiable generosity, we suppose that the Qur'an means only the very beginning of the formation of the cartilage (chondrification) before they are in any sense complete shapes and the beginning of the formation of muscles, even this happens at the same stage (around day 41). Going back earlier still, it can even be pointed out that the precursors of muscles (myoblasts) and precursors to the cartilage (mesenchyme) are present in the limb bud as soon as it arises.  
Even if we were to accept that the Qur'an was only referring to precursors of bone and not bone itself, even though it used the Arabic word for bone ('itham), and not cartilage (ghurdoof), the embryology is still wrong. Even if, with further and unjustifiable generosity, we suppose that the Qur'an means only the very beginning of the formation of the cartilage (chondrification) before they are in any sense complete shapes and the beginning of the formation of muscles, even this happens at the same stage (around day 41). Going back earlier still, it can even be pointed out that the precursors of muscles (myoblasts) and precursors to the cartilage (mesenchyme) are present in the limb bud as soon as it arises.  


Of course, the natural reading of verse 23:14 is that the bones have some sort of meaningful shape, and can meaningfully be called bones. This is certainly not the case when the condensed mesenchyme has merely started to chondrify. Furthermore, the natural reading of verse 23:14 is that all the bones have some meaningful presence worthy of the label 'bones' before Allah clothes them with flesh.
Of course, the natural reading of verse 23:14 is that the bones have some sort of meaningful shape, and can meaningfully be called bones. This is certainly not the case when the condensed mesenchyme has merely started to produce cartilage. Furthermore, the natural reading of verse 23:14 is that all the bones have some meaningful presence worthy of the label 'bones' before Allah clothes them with flesh.


We have more evidence that 23:14 refers to things already recognisable as bones being clothed with muscles or flesh elsewhere in the Qur'an. Verse 2:259 uses the same Arabic words as does 23:14 for 'bones', 'clothed' and 'flesh' to describe the resurrection of a donkey which had been dead for 100 years. The main embryology passages, such as verse 22:5 (see quote above) suggests that embryological development has similarities with resurrection.
We have more evidence that 23:14 refers to things already recognisable as bones being clothed with muscles or flesh elsewhere in the Qur'an. Verse 2:259 uses the same Arabic words as does 23:14 for 'bones', 'clothed' and 'flesh' to describe the resurrection of a donkey which had been dead for 100 years. The main embryology passages, such as verse 22:5 (see quote above) suggests that embryological development has similarities with resurrection.
Retrieved from "http://wikiislam.net/wiki/Embryology_in_the_Quran"