mother cell
7.The move means of tumour of retinal mother cell has two kinds of ways, it is course optic nerve, enter the space below spider film to spread inside skull, perhaps enter retinal center, abide sequence of thought provides move of body whole body; It is to encroach additionally choroid, enter eye socket through blood-vessel, or by blood, lymphatic move arrives systemic organ.
8.The vegetative shoot apex is thin and flat morphologically, and its cytohistological zonation pattern is an apical initial zone, a central mother cell zone, a cambium-like transitional zone, a peripheral zone, and a rib meristem, while cone apex is coniform, and its apex structure consist of outer mantle and inner pith.
9.Grow grain, say to expand again grain, as a result of,be adrenal had secreted fill, of human body adrenal coriaceous can secrete a kind of candy coriaceous hormone, this hormone can decompose the bounce fibrin in the skin carbohydrate character, make stretch fiber produces denaturation; In the meantime, return the hyperplasia that can restrain fiber mother cell, bring about skin flexibility thereby fiber happening ruptures.
