A stem is one of two main structural axes of a vascular plant, the other being the root. It supports leaves , flowers and fruits , transports water and dissolved substances between the roots and the shoots in the xylem and phloem , engages in photosynthesis, stores nutrients, and produces new living tissue. [ 1 ]

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This micrograph of a herbaceous dicot stem shows four basic parts (in order from outside to inside): epidermis, cortex, vascular bundle, and pith. Notice how the vascular bundles of dicots are arranged in a ring around the circumference of the plant stem with the cortex to the outside and pith to the inside.

The anatomy of the stem (internal structure) can be examined through longitudinal sections (cutting the stem lengthwise) or in cross sections (cutting a slice of the stem perpendicular to the length). All three tissue types are represented in the primary stem. The epidermis is the dermal tissue that surrounds and protects the stem. The ...

2024年11月23日 · Stem Anatomy. The stem and other plant organs are primarily made from three simple cell types: parenchyma, collenchyma, and sclerenchyma cells. Parenchyma cells are the most common plant cells. They are found in the stem, the …

The stem of a plant bears the leaves, flowers, and fruits. Stems are characterized by the presence of nodes (the points of attachment for leaves or branches) and internodes (regions between nodes). Plant organs are made up of simple and complex tissues. The stem has three tissue systems: dermal, vascular, and ground tissue.

2025年3月7日 · stem, in botany, the plant axis that bears buds and shoots with leaves and, at its basal end, roots. The stem conducts water, minerals, and food to other parts of the plant; it may also store food, and green stems themselves produce food.

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The stem region between two nodes is called an internode. The stalk that extends from the stem to the base of the leaf is the petiole. An axillary bud is usually found in the axil—the area between the base of a leaf and the stem—where it can give rise to a branch or a flower.

2014年2月26日 · This refers to the stem or stalk of a flower. Receptacle. This is the thickened part at the bottom of the flower which holds its major organs. Pistil. This is the female organ of the flower. It consists of four major parts: Stigma – The head of the pistil. The stigma receives pollen, which will begin the process of fertilization.