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Spongy tissue is a type of tissue found both in plants and animals. In plants, it is part of the mesophyll , where it forms a layer next to the palisade cells in the leaf . The spongy mesophyll's function is to allow for the interchange of gases (CO 2 ) that are needed for photosynthesis .
The veins are the vascular tissue of the leaf and are located in the spongy layer of the mesophyll. The pattern of the veins is called venation . In angiosperms the venation is typically parallel in monocotyledons and forms an interconnecting network in broad-leaved plants .
Parenchyma is a versatile ground tissue that generally constitutes the "filler" tissue in soft parts of plants. It forms, among other things, the cortex (outer region) and pith (central region) of stems, the cortex of roots, the mesophyll of leaves, the pulp of fruits, and the endosperm of seeds.
For a long time, it has been largely accepted that sponges lack true tissue, but it is currently debated as to whether mesohyl and pinacoderm layers are tissues. The mesohyl is composed of the following main elements: collagen , fibronectin-like molecules, galectin , and a minor component, dermatopontin .
Vascular tissue is a complex conducting tissue, formed of more than one cell type, ... In leaves, the vascular bundles are located among the spongy mesophyll.
According to updated economic forecasts from the Fed's Summary of Economic Projections (SEP), the central bank sees core inflation hitting 2.5% next year, higher than its previous projection of 2. ...
The Federal Reserve cut its benchmark interest rate Wednesday to between 4.25% and 4.5%. The central bank also projected two cuts next year instead of four, sending stocks tumbling.
English: The fine scale structure of a leaf featuring the major tissues; the upper and lower epithelia (and associated cuticles), the palisade and spongy mesophyll and the guard cells of the stoma. Vascular tissue (veins) is not shown. Key plant cell organelles (the cell wall, nucleus, chloroplasts, vacuole and cytoplasm) are also shown.