The nasal cavity externally opens through the nostrils, continues to the pharynx, where, further joins the remaining respiratory system. In the middle, it is separated by the nasal septum. The division of nostrils includes roof, floor, and walls whereas the nasal cavity is divided into the
a) vestibule - It is the dilated area at the nostril opening
b) respiratory - It is the passages through which air travels into the respiratory system
c) olfactory sections- It has olfactory receptors & Bowman's glands.
tiger moths have dark wings with red orange spots and white stripes meanwhile a typical moth has a dark, almost black body and have many dark spots with grayish-white wings
Today, the atmosphere holds about 21 per cent oxygen. ... When the first simple organisms appeared in the oceans more than 3.5 billion years ago, the atmosphere was mostly nitrogen, hydrogen, water vapor, and carbon dioxide
