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.
Spicules of Sponges. 1  Spicules are formed by scleroblast cells present in the mesenchyme. 2  They consists of an axis of organic material around which calcium carbonate or silica is deposited. 3  They are of various shapes. 4  Monaxons-single axis growing in one or more directions. 5  Triaxons-three axes crossing each other and have six rays. 6  Tetraxons-four ...eneral Characteristics of Porifera. 1  Poriferans are commonly called sponges. 2  These are multicellular organisms which are sessile/sedentary in nature. 3  Most of them are marine while a few are fresh water forms. 4  Body is cylindrical, asymmetrical or has radial symmetry.