Buddha Abhidhamma - Ultimate Science - BuddhaNet

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Explanation
Avijjà, taõhà, upàdàna are defilements (kilesà). So they are grouped
as kilesa-vañña.
Kamma-bhava and saïkhàra are kamma-formations. So they
are grouped as kamma-vañña.
Upapatti-bhava, vi¤¤àõa, nàma-råpa, saëàyatana, phassa, vedanà,
jàti, jarà-maraõa are the resultants (vipàka) of kamma-formations.
So they are grouped as vipàka-vañña.
In the past, because of ignorance (avijjà), we have false view
and attachment (taõhà) to sense-objects. When the attachment
and the false-view grow up to strong craving or grasping
(upàdàna), we perform wholesome or unwholesome deeds
(kamma-bhava and saïkhàra). This illustrates how kilesa-vañña gives
rise to kamma-vañña in the past.
Now because of kamma-formations (kamma-bhava and
saïkhàra) in the past, vipàka-vañña – viz., upapatti-bhava, vi¤¤àõa,
nàma-råpa, saëàyatana, phassa, vedanà, jàti, jarà-maraõa – arises in
the present life. At the same time avijjà, taõhà and upàdàna come
along with vi¤¤àõa as anusaya-kilesàs (latent defilements). When
the six bases (saëàyatana) are in contact with the sense-objects
and phassa and vedanà arise, those anusaya-kilesàs arise as fullfledged
kilesàs. So we get kilesa-vañña again.
As the result of kilesa-vañña, kamma-vañña arises. As the result
of kamma-vañña, vipàka-vañña arises. And as the result of vipàkavañña,
kilesa-vañña arises again. So the rounds of vañña will keep on
rotating, and so does the wheel of Pañiccasamuppàda, for ever.
7 Two Roots (Måla)
The wheel of Pañiccasamuppàda (see Table 8.1) can be divided into
two portions. The first portion starts from the Past Causes and