Metabolic waste. 'Metabolic wastes or excretes are substances left over from metabolic processes (such as cellular respiration), which cannot be used by the organism (they are surplus or toxic), and must therefore be excreted. This includes nitrogen compounds, water, CO2, phosphates, sulfates, etc. Animals treat these compounds as excretes.
Flan is an open pastry or sponge cake containing a sweet or savoury filling. A typical flan of this sort is round, with shortcrust pastry, usually coated with sweet syrup.It is similar to a custard tart or a South African melktert. British savoury flans may have diverged from the Spanish and French custard flans (also known as creme crÃ¨me) caramel in The Middle. ages typical flan of this sort is round, with shortcrust pastry, usually coated with sweet syrup. It is similar to a custard tart or a South African melktert.
Interestingly, flan found two different outlets. In Spain it became a sweet custard generally made with caramelized sugar. The mixture of milk, eggs and sugar was cooked slowly in crocks and relished by many.early all of Central and South America loves flan in its various custardly forms. It has become especially associated with Mexico where flan is exquisitely produced in the kitchens of rich and poor alike. England, with its love for pastry crusts, went its own way and developed a different kind of flan.