Grey describes the infinite shades of colour between brilliant white and black.
Pearly - A very pale bluish-grey colour, paler than slate grey.
Silver - A greyish-white.
Slate - A pale bluish-grey colour. Slate grey implies hardness, conjuring images of the hard, cold natural stone.
Steel - A pale bluish-grey colour. Steel grey implies hardness in much the same way as slate grey, but with the image of the metal rather than the mineral.
Mother of pearl is the iridescent pearly substance which forms the internal layer of many kinds of sea shell. Mother of pearl is widely used in jewellery and other decorative work. Research Mother Of Pearl
The chinchilla is a small squirrel-like herbivorous rodent found in the Andes of Chile and Bolivia. They are very closely allied to the rabbit, which they resemble in the general shape of the body, in the limbs being longer behind than before, in the conformation of the rootless molars, and by the nature of the fur, which is more woolly than silky; but differing from the rabbit in the number of
their incisors and molars, in a greater length of tail, and also in having broader and more rounded ears. Chinchilla lanigera a species about 15 inches long, is covered with a beautiful pearly-gray fur, which is highly esteemed as stuff for muffs, pelisses, linings, fur coats etc. The chinchilla lives gregariously in the mountains of most parts of South America, and makes numerous and very deep burrows. It is of a gentle nature, very sportive, losing none of its gaiety in captivity, and living very cleanly. Research Chinchilla
The freshwater oyster is a popular name for any species of shellfish of the genus Etheria, and allied genera. They are found in the rivers of Africa and South America. They are irregular in form, and attach themselves to rocks like oysters, but they have a pearly interior, and are allied to the freshwater mussels. Research Freshwater Oyster
Haliotis is a genus of gateropodous molluscs commonly called abalone, ear- shell or sea-ear and found adhering to rocks on the sea-shore. They are remarkable for the pearly iridescence of their inner surface. Research Haliotis
The nautilus is a shelled cephalopod of the genus Nautilus, found in the Indian and Pacific oceans. The pearly nautilus (Nautilus pompilius) has a chambered spiral shell about 20cm in diameter. Its body occupies the outer chamber. The nautilus has a large number of short, grasping tentacles surrounding a sharp beak. The living nautiluses are representatives of a group common 450 million years ago. Research Nautilus
Unionidae is the Fresh-Warerr Mussels family of bivalve molluscs. The two valves of the shell are equal and sometimes very thick, with pearly inner lining, the foot large and thick, and the byssus or attaching threads absent. They occur in rivers and lakes in all parts of the world. In Great Britain four species occur ; Unio tumidus and Unio pictorum in the rivers of southern England. The pearlmussel, Unio margaritiferus, which occurs in the mountain streams of Scotland and Ireland, was formerly the source of an important industry. Anodonta cyqnea ia the swanmussel found in large ponds. Research Unionidae
In the human body, the throat is the part of the body extending from the base of the tongue to the trachea (windpipe). The throat contains the organs for the production of sound and affords passage to the stomach and to the lungs.
The beginning of the throat is presented on looking into the mouth. In the middle line above, is the uvula hanging from the soft palate. On either side the soft palate becomes continuous with the two pillars of the fauces, and below, these again are continuous with the root or base of the tongue. Between the pillars of the fauces on either side are the tonsils, which if enlarged can narrow the enterance to the throat to a dangerous extent. Above and behind the soft palate is the nasopharynx into which the posterior ends of the nostrils open.
Projecting upwards in the middle line at the base of the tongue is the epiglottis. From each side of this two folds project backwards and touch one another behind, leaving a triangular interval, which is the enterance to the larynx. Behind the place where these bands join is a narrow gap forming the enterance to the oesophagus.
The vestibule of the larynx contains two fleshy-looking bands, called the false cords, which are highly developed in the lower animals. Deeper in the larynx are two thinner, pearly-white bands which are the true vocal cords, the essential organs of sound. Theye are enclosed in a more or less rigid box of cartilage, the front of which can be seen in the middle line of the neck in a man and is popularly known as the 'Adam's Apple'. Research Throat
 
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