There are three main subclasses of gastropods; the Prosobranchia (ocean snails), Opisthobranchia (sea slugs, sea butterflies and sea hares), and Pulmonata (land and freshwater snails and slugs). Each of the subclasses has evolved in their own way and members differ in their reproduction and life cycles within the subclasses. The gastropod folks are so large it really is impossible to spell out living cycle of each one individual species, but a majority of general rules do apply. The more evolved the species, the more complex their reproductive cycle in addition to their biology. Here we will look at the life span cycle of a gastropod through various examples and how they differ with regards to the type. A diaper cake usually layers of diapers, rolled or curved around a center base, giving the appearance of a "cake". Then "ingredients" are included with make "icing" special. Ribbons and blankets and onesies and plush animals, plus pacifiers, washcloths, teething rings, rattles...oh the list may be endless. The idea being that to give these gifts inside a practical way just doesn't seem special enough. Put them all in the diaper layers and also the effect can be spectacular. These treatments also apply to the types of inflammation of arthritis, such as rheumatoid arthritis, as well as anti-inflammatory drugs such as corticosteroids and non-steroidal anti-inflammatory drugs (NSAIDs), anti-rheumatic drugs (DMARDs ), As well as a relatively new drug called a biologic. The thyroid gland is situated in the low neck in the front. It looks just like a butterfly and produces those hormones triiodothyronine and thyroxine. These hormones are responsible for controlling how fast cells burn the fuels from food to generate energy. Thyrotropin controls thyroid hormone production and release. The pituitary gland secretes it.