Gregor Mendel choose the pea plants because they had easily observable traits there were 7 of which he could manipulate. I hope that helps
The answer is glucose and oxygen.
<span>The papillary region</span> is the structure that house Meissner's corpuscles, free nerve endings and capillary loops.
<span>This region is the superficial portion of the dermis, about 1/5 of the dermis. The papillary region consists of areolar connective tissue with thin collagen and fine elastic fibers.</span>