Search in gallery Scanning Electron Micrograph of Pinus wood - Large (151 Kb) - Scroll down   to information With labels Legend: A  tangential C  radial 1  ray 2  growth ring B  tangential   English name: Pine Scientific name: Pinus sp. Familia: Pinaceae Classis: Coniferopsida Phylum: Gymnospermae Regnum: Plantae Wood can be cut in 3 main orientations: Proceed to the cross (= transverse), radial (along the plane of the rays) and tangential (perpendicular to the rays). The growth rings corresponds with the transition wood (small vessels) from the end of a growth season to the beginning of a new season.

http://www.vcbio.science.ru.nl/en/image-gallery/show/PL0223/print/