The document summarizes the key components and functions of xylem and phloem tissue in plants. Xylem tissue conducts water and minerals throughout the plant and is composed of tracheids and vessels. Phloem tissue conducts sugars and transports them from leaves to other plant parts. Phloem consists of sieve tubes made of elongated living cells called sieve elements connected end to end to form columns. Each sieve element has an associated companion cell that provides energy and nutrients to keep the sieve element alive via plasmodesmata.