A leaf blade, also known as lamina, is the flat, expanded part of a leaf that is attached to the stem or petiole. It is the main site of photosynthesis in the plant and contains veins that transport water, nutrients, and sugars throughout the leaf. The shape and size of the leaf blade can vary greatly between different plant species, and they may be simple or compound. Simple leaves have a single blade, while compound leaves are made up of multiple leaflets attached to a common petiole. The leaf blade is an essential part of a plant's anatomy and plays a critical role in its survival and growth.
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