1. Plant Science Terms and Anatomy
Stems

2. Stems-External Lenticels-breathing pores
Bud scale scars-show where terminal buds have been located
Leaf Scars-show where leaves were attached
Terminal bud-bud on the end of a stem
Axillary or lateral bud-bud on side of stem

4. Stems-Internal Cotyledons
Monocot-plant stems have vascular bundles that contain both xylem and phloem in each bundle. Produce 1 seed leaf.
examples: corn, grasses
Dicot-plant stems have the phloem layer and xylem layer separated by cambium. Produce 2 seed leaves.
example: trees

7. Stems-Internal
Xylem-tissue that transports water and nutrients up from the roots to stems and leaves
Phloem-tissue that transports food down from leaves to roots

8. Stems-Internal
Phloem
Phloem
Xylem

9. Stems-Internal
Cambium-thin, green, actively growing tissue located between bark and wood and produces all new stem cells
Bark-old inactive phloem
Heartwood-old inactive xylem
Sapwood-new active xylem

10. Stems-Internal
Dicot
Bark
Cambium
Sapwood
Heartwood

11. Functions of Stems
Translocation-moves water and minerals from roots up to the leaves and move food from the leaves down to the roots
Supports branches, leaves, flowers, fruits and seeds