1 Aim to settle the baby for daytime naps and night-time sleep in a predictable way (eg, quiet play, move to the bedroom, wrap the baby, give the baby a brief cuddle, then settle in the cot while still awake). 2  Avoid excessive stimulation-noise, light, handling. 3  Excessive quiet should also be avoided.
The skeleton of the sponge is composed of tiny needle-like splinters called spicules, a mesh of protein called spongin, or a combination of both. Many sponges can only be identified by microscopic examination of the skeleton, which makes certain identification from photographs difficult.he collar cells have a sticky, funnel shaped collar and a hairlike whip, called a flagellum. The collar cells serve two purposes. First, they beat their flagella back and forth to force water through the sponge. The water brings in nutrients and oxygen, while it carries out waste and carbon dioxide.
This is the origin of the Metazoa, or multicellular organisms (Dawkins 2004). An experiment performed by H. V. Wilson of the University of North Carolina was published in the 1907 issue of the Journal of Experimental Zoology (Wilson 1907). He separated the cells of a living sponge by forcing it through a fine sieve.heir skeleton is made of tiny, needle-like splinters, or a mesh of protein called spongin (2) Most of the Demospongiae are made of spongin. Some of the sponges are made of both spicules and spongin. Bath sponges are made of calcereous or siliceous spicules, and they are therefore soft to the touch.