Technically, the harmony and blending would be "Aiki".
As for Ki principles not being taught, it depends on the school. For instance Seidokan and Shin Shin Toitsu Aikido both emphasize these.
By the way "internal" and "ki" are not the same things...
I agree with the others that every living being has ki. Some more, some less... but without it you'd be dead.
As for what makes something internal (or external for that matter), I've posted this in a couple of other forums:
"I was taught that Internal has nothing to do with whether an art is soft, uses Qi or what not. It has to do with how you manifest your 'jing', i.e. the issuance of whole-body power using proper biomechanics and being in a state of dynamic relaxation. IMA's (internal martial arts) also seek to develop the feel of a "united body" over strength, and uniting your mind and body to direct your "jing". One of the requirements during the issuance of force in IMA is using a unified body.
External MA then uses sectional power, meaning the body is not united in it's issuance of force. An external artist may strike using a lot of rotational power from the hip which generates a whip like motion to the fist (as an example). While the external practitioner may be relaxed during the strike (until the final moment of impact), the issuance of power differs from the 'whole-body power' used in IMA.
Of course one of the GENERAL differences in characteristics between IMA and EMA imho is the difference in it's application.
IMA's characteristics are to never issue force until you are in an advantageous position by trying to 'borrow the opponents energy'; sticking and following the incoming force vector; and lastly avoidance of direct contact (never meet power with power).
These principles hold true for most biomechanically efficient styles.
Just some thoughts from the cheapseats...
Also in regards to Qi/Ki, I believe it means 'life force', nothing more nothing less. Hence, without ki we would be unable to live. Everybody/thing has ki some stronger, some weaker."
Here's an addendum to the above in the same thread:
"I want to make myself a little clearer so thereÂ’s no confusion.
An external martial artists may shift his ‘whole body’ to engage a strike, but often uses compartmentalized power to generate force. When looking at issuing power there are definitely a couple of distinct ways it cam be issued. As discussed there are what I have come to call "sectional" and "whole body" power. When struck, you would very much be able to tell the difference between the two types of force.
Having a long Karate (Kyokushinkai and Kempo) background I can certainly relate to the 'sectional power' theory. For instance, many Karate and Kung Fu styles will harden their fist (ala iron fist, iron palm training). Now this is never seen in IMA as the focus is never on the striking weapon but on the connection of mind, body and the ground to generate the force. The fist/leg or what not just happens to be there to be used.
As many of you know, different arts have different training methodologies. However, how you issue power is quite congruous between most external styles, the same can be said of internal styles... (since we're using these labels for the sake of this topic). There definitely are commonalities when you break down the biomechanics of each 'branch' (i.e. internal vs. external).
As I mentioned, I don't like using the labels... but I look at the styles as biomechanically efficient vs. not. BTW, this by no means mean that one is more effective than anotherÂ… perhaps less efficient?
Also, another thing I've observed is that most styles that fall within the biomechanically efficient systems (internal) are the focus on teaching principles over techniques, which may be the case of some Kenpo styles. Some of the internal systems may teach forms but most teach sequences of movement (kinetic chains) in order to program your neuromuscular system as opposed to external systems were they use rote memorization of techniques."
KG