The Importance of Ablution

'Abdullah ibn as-Sunnabiji stated that the Messenger of Allah said, "When a slave makes ablution and rinses his mouth, his wrong deeds fall from it. As he rinses his nose, his wrong deeds fall from it. When he washes his face, his wrong deeds fall from it until they fall from beneath his eyelashes. When he washes his hands, his wrong deeds fall from them until they fall from beneath his fingernails. When he wipes his head, his wrong deeds fall from it until they fall from his ears. When he washes his feet, his wrong deeds fall from them until they fall from beneath his toenails. Then his walking to the mosque and his prayer give him extra reward." (Related by Malik, an-Nasa'i, Ibn Majah and al-Hakim.)

According to chinese acupuncture, there are 700 + points and 66 of them are drastic spots. only 61 are in the zone required by ablution. 5 however are from knee to ankle (theres a hadith to second this but i couldnt find).

Ablution acts as "hydro-massage" other than to wash and hydrate.

Mouth > this is obvious. washing mouth removes food particles which cause gums, ulcers etc. Nabi PBUH also introduces siwak before ablution.

Nostrils > nostrils are like air filters. clean them regularly so germs dont pass to your respiratory system.

Face > face is related to intestines, stomach and bladder. washing face will have a positive effect on the nervous and reproductive systems.

Arms > because we touch lot of things in our daily life and we have lots of organism on our skin.

Right Leg > connected to osseous system, intestine, nervous system, lumbar area, stomach, pancreas, gall-bladder, thyroid gland, solar plexus and others. washing them is to cool and to refresh.

Left Leg > connected to the pituitary gland also the brain organ that regulates the functioning of the endocrine glands and controls growing. washing them has the same effect as above

Legs > to prevent us from athlete's foot. a sunnah of Nabi PBUH is also to wash between toes thoroughly

Ears > washing ear’s cochlea can harmonize the work of almost all organs, decrease high blood pressure and relieve tooth and throat pain

Over all, ablution also has an exercising effect on all the muscles involved in its movement, which are thus being stimulated five times a day or even more according to repetition.