Tips and Tricks on Human Reproduction



They are of three types of cellular growth
1. Auxetic Growth. Growth due to increase in size of cells (not number), e.g., nematodes, rotifers, tunicates (Herdmania), muscle fibres.
2. Multiplicative Growth. Growth mainly due to increase in number of cells, e.g., embryo growth.
3. Accretionary Growth. Growth due to activity of reserve cells (e.g., formation of crythrocytes from erthropoietic tissue) and secretion of extracellular matrix.

Brain. A new born baby has only 400 gm brain while an adult has 1.4 kg brain.

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