Final answer:
The three major plant tissue systems are the dermal tissue, vascular tissue, and ground tissue. Dermal tissue protects the plant, vascular tissue transports necessary substances, and ground tissue is involved in photosynthesis and support.
Step-by-step explanation:
Plant organs are made up of three major tissue systems: dermal, vascular, and ground tissue.
Dermal tissue:
Dermal tissue is the outer covering of the plant and protects it from external factors. It consists of epidermal cells, stomata, guard cells, and trichomes. Epidermal cells provide a protective barrier, stomata allow for gas exchange, guard cells regulate the opening and closing of stomata, and trichomes can serve various functions such as reducing water loss or deterring herbivores.
Vascular tissue:
Vascular tissue is responsible for the transport of substances within the plant. It is composed of xylem and phloem tissues. Xylem transports water and minerals from the roots to the rest of the plant, while phloem transports sugars and other organic molecules (such as hormones) throughout the plant.
Ground tissue:
Ground tissue is involved in photosynthesis, storage, and support. It consists of three types of cells: parenchyma, collenchyma, and sclerenchyma. Parenchyma cells are involved in photosynthesis and storage of nutrients, collenchyma cells provide flexible support to young plant parts, and sclerenchyma cells provide rigid support to mature plant parts.