Plant cell the major classes of cells and tissues of roots, stems, leaves, flowers, and reproductive structures, each of which may be composed of several cell types. Parenchyma cells are living cells that have functions ranging from storage and support to photosynthesis (mesophyll cells) and phloem loading (transfer cells). Apart from the xylem and phloem in their vascular bundles, leaves are composed mainly of parenchyma cells. Some parenchyma cells, as in the epidermis, are specialized for light penetration and focusing or regulation of gas exchange, but others are among the least specialized cells in plant tissue, and may remain totipotent, capable of
Alternative explanations of the "grandmother" cell in the middle layer. The middle layer is hidden and projects the coding from 80 cells to the eight output cells. These eight output cells could discriminate faces from non-faces just like grandmother cells are thought to do. Cottrell had no idea how synaptic connections should be configured in the artificial neural network. Cottrell overcame this issue by using a biologically realistic adjustment. The Artificial Neural Network (ANN) was initially trained with 64 images, but was eventually pushed outside the training boundary. In a training session the facial recognition was performing at 100%. When the ANN performed facial recognition testing