Medullary Rays Collection

Cotton plant root, light micrograph
Cotton plant root. Light micrograph of a transverse section through a root of the cotton plant (Gossypium hirsutum). The layers from outer to centre (some very thin)

Stinging nettle stem, light micrograph
Stinging nettle stem. Polarised light micrograph of a transverse section through a stem of the stinging nettle plant (Urtica dioica)

Birch stem, light micrograph
Birch stem. Light micrograph of a transverse section through the woody stem of a birch (Betula alba) tree, showing a portion of the xylem including some of the pith (bottom left)

Brazilian liana. Light micrograph of the vascular bundles (circular) in the stele of a brazillian liana stem. The red tissue betweent the bundles are medullary rays

Stem of old mans beard. Light micrograph through the cross section of the stem of old man beard (Clematis vitalba, family Ranunculaceae)

Liana stem. Light micrograph of a vascular bundle in a transverse section through a Brazilian liana stem showing the xylem and phloem

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Medullary rays, also known as pith rays or wood rays, are a fascinating feature found within the structure of various plant stems and roots. When observed under a light micrograph, such as in the case of a pine stem or cotton plant root, these medullary rays reveal intricate patterns that offer insight into the inner workings of these plants. In a pine stem's light micrograph, one can witness the delicate arrangement stretching from the center towards the outer layers. These radial structures play an essential role in transporting nutrients and water throughout the tree trunk. They act as conduits for sap flow and provide support to maintain structural integrity. Similarly, when examining a clematis stem's light micrograph, we can observe how medullary rays extend vertically through its vascular tissues. This unique pattern aids in distributing vital resources to different parts of this climbing vine. Shifting our focus to cotton plant roots' light micrographs reveals yet another captivating display of medullary ray formations. These networks branch out horizontally from the central core, facilitating nutrient absorption and anchoring stability for these underground systems. The repetition of "Pine stem" emphasizes their significance while highlighting their distinct appearance under microscopic examination. The inclusion of other examples like "Clematis stem" and "Cotton plant root" showcases how diverse species utilize medullary rays for survival. Overall, studying these mesmerizing images allows us to appreciate nature's intricate design on both macroscopic and microscopic levels. Medullary rays serve as crucial components within plants' internal architecture - connecting different regions with life-sustaining resources while displaying stunning visual patterns that captivate scientists and enthusiasts alike.