If God designed the human body then He failed Bioengineering 101. Any first year medical student could have done a better job of it.
*If God doesn't like foreskins, why did He create human males that are born with foreskins?
*Perfect eyesight? A goodly number of humans need to wear glasses, even from a relatively early age.
*Juxtaposition of the food tube and the air tube and thus people can (and do) choke to death - not the best of intelligent designing.
*Juxtaposition of the reproductive system and the waste elimination system - again, not the best of intelligent designing.
*One blood type would have done very nicely thank you especially when it comes to transfusions. Instead, we have basically eight blood types: A, B, AB and O, plus Rh+ and Rh- for each type.
*Humans have apparently a few rather useless organs, for someone "designed" less than six thousand years ago. There's the wisdom teeth (that cause no end of jawbone crowding); the appendix; the tonsils; and the adenoids.
*If you ever suffer from a bad lower back, blame God.
*To prevent a lot of death (and suffering), the birth canal could have been a bit larger than God designed it to be.
*Unlike most body cells - stomach, skin, liver, blood, etc. - muscle, especially heart cells; nerve cells (except apparently nasal neurons - those nose nerves, and egg cells don't regenerate. What you get; your initial quota, is it. That's all you get - ever.
*Why male nipples?
*Your blood, hemoglobin, has a far greater affinity for carbon monoxide than for oxygen which results in unnecessary deaths from carbon monoxide poisoning.
*We come with a lot of duplication - two arms, hands, legs, eyes, ears, tonsils, nostrils, lungs, kidneys, testicles, ovaries, even two brain hemispheres. However, considering the importance of it, and unlike Doctor Who, we just have one heart.
*We also have just two legs which means we are very, very unstable and very prone to losing our balance and falling over, and that's without any / the benefit of a balancing tail (as per birds, kangaroos, etc.). A far better design would have been four legs and two arms, sort of like a Centaur.
*Teenage males have way too much testosterone.
*Unlike say stomach acid, mucus, saliva, bile, etc. humans can't internally manufacture many of the necessary minerals and vitamins that are required.
What about the human brain.If god is all knowing and has a plan like all the religious people would have you believe, why would a God create a brain in a human that would eventually develop the ability to destroy all plant and animal life that will ultimately lead to the next great extinction.Ths would be the ultimate bad design.
In my opinion by far the best example of appallingly bad design, but something which makes perfect sense through the prism of evolution, is the recurrent laryngial nerve. This nerve runs from the brain to the larynx (obviously), but it has a rather circuitous path being looped around the aorta. And if you think that's pretty weird in a human, it does the same thing in a giraffe and probably did in a brontosaurus). In our fish ancestors this nerve ran from the brain to the gills, and past what passed for a heart. As vertebrates evolved from fish the gills became the larynx, and the heart moved down into the chest cavity taking the laryngial nerve with it.
Another example of ' poor design by God' is the appendix in humans.
Where once it was vital in aiding digestion solely of vegetable fibres in a herbivorous diet, humans are now, for the most part, omnivorous thus the appendix has become obsolete and often gets badly infected/inflamed causing either removal or resulting in a most painful and slow death when left untreated.
Why did this " Intelligent Designer' decide that mammals should have their birth canals placed in such close proximity to their biological waste ' outlets' which are prime source of innumerably dangerous and often fatal infective agents?
Why did this 'Intelligent Designer' deem it right to have some creations capable of regenerating lost limbs/extremities and others not to have such a capability?
Why did this ' Intelligent Designer' make it that humans, its greatest creation btw, are only capable of having 1 pregnancy in a period of 12 months, with an average of 1 off-spring per pregnancy when other mammals in particular, e.g. cats, dogs, rats, mice, etc, can have multiple pregnancies with multiple off-spring in each pregnancy?
A further interesting example is our acquired inability to make our own vitamin c. I say acquired because most other animals, including most other vertebrates, make their own. Primates cannot. Somewhere the ancestor of all primates got a faulty copy of the vitamin c making gene (which we still carry - we have a copy of the gene, but it is broken). Since primates evolved in Africa where there was plenty of vitamin c containing fruit around there was probably no selection pressure against animals that needed to get their vitamin c from external sources. Interestingly until early versions of the genus Homo, with their superior brains, came along there were no primates in Europe perhaps due to the lack of vitamin c in the available food.
Vitamin B12 is interesting too. We can manufacture B12 in our gut, but that happens lower down than where B12 is absorbed. So we can be B12 deficient while shitting out tons of the stuff!
How about the fact that every cell in the today needs glucose for fuel but glucose cannot pass through the the cell membrane without being bound to an insulin molecule. Type 1 diabetes don't make insulin anymore. Type 2 diabetes the insulin that gets made is messed. What's up with that? Why even require insulin at all?
Aside from all the above, and they're all good points, the one thing that makes the the notion of 'intelligent design' that seems utterly ridiculous is that 99.9% all things/creatues that have ever lived are now extinct. What's intelligent about that?
My other favourite intelligent design nonsense is that the one thing we need for life, the sun, also gives you cancer. That seems pretty intelligent too
God is so brilliant he gave plants and trees photosynthesis allowing them to get energy without any effort. Then he she it creates human, the perfect in his image and says this:
To maintain living you must consume fresh kill. If you do not kill something, plant or animal, you will perish. Now that is one intelligent design. And then we turn around and worship this nut job.