(B) In mosses,the central part of the stem axis is known as the medulla or central strand. This region consists of a conducting strand made of slightl

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(B) In mosses,the central part of the stem axis is known as the medulla or central strand. This region consists of a conducting strand made of slightly thick-walled,elongated,dead parenchymatous cells,which is specifically referred to as the $Hadrome$. The $Hadrome$ functions in the conduction of water and minerals,analogous to the xylem in higher plants.