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.
Within the body of the sponge, the water may pass through a large cavity (the spongocoel) through a system of canals and chambers, or through a combination of these two. e. Movement of water through the sponge body is accomplished by the beating of the choanocyte flagella.n some sponges this outer tissue layer is syncytial while in others the pinacocytes are all distinctly separated from one another by cell membranes. The innermost tissue layer is composed of cells called choanocytes or collar cells, which have flagella that beat to produce water currents through the sponge body.