The primary plant body is formed by the division and differentiation products of the apical meristems.
The primary plant body includes the procambium, which forms the primary vascular tissue.
On the other hand, growth in the plant that results from the activity of a cambium producing increase, especially diameter, is mainly responsible for the bulk of the plant body, and supplies protective, supporting, and conducting tissue.
The secondary plant body is composed of the division and differentiation components of the fascicular and interfascicular cambia.