Symplast refers to the interconnected network of living plant cells that communicate and transport substances through their cytoplasm. This system allows for the movement of water, nutrients, and signaling molecules between cells, facilitating essential processes like growth and response to environmental changes. In plants, the symplast is formed by the plasmodesmata, which are tiny channels that connect adjacent cells. This connection enables efficient transport and coordination of activities within the plant, playing a crucial role in maintaining homeostasis and overall plant health.