Tube that carries nutrients from the leaves?

The tube that carries nutrients from the leaves is the phloem. It is one of the two types of vascular tissues in plants, the other being the xylem. The phloem is responsible for transporting the products of photosynthesis, which are produced in the leaves, to the rest of the plant. These products include sugars, amino acids, and other nutrients.

The phloem consists of two types of cells: sieve tubes and companion cells. Sieve tubes are the main transport cells of the phloem, and they are arranged in long columns. The companion cells are smaller cells that are associated with the sieve tubes and help to regulate their function.

The transport of nutrients through the phloem is driven by a process called translocation. Translocation occurs when the concentration of nutrients is higher in the leaves than in the rest of the plant. This creates a gradient that allows the nutrients to move from the leaves to the rest of the plant.

The phloem is an important part of the plant's transport system, and it plays a vital role in the plant's ability to survive.