plants

• Autotrophs


  They make their own food
• Parenchyma


  • Photosynthesis
  • Storage
  • Secretion
• Collenchyma


  • Support
  • Structure of the cell wall
• Epidermis


  • Secretion of cuticle
  • Protection
  • Gas exchange
• Periderm


  Present in woody plants
• Xylem


  Water conduction
• Phloem


  Food conduction
• Roots


  Develops from the seed embryo called hypocotyl
• Taproot


  • Has main roots and branched in lateral roots. usually present in dicot plants.
• fibrous plants - long roots that extends to a distance outward from the base
• Root cap - thimble shaped mass of cells that covers and protect the root tip.
• meristematic region - dome shaped, consists if dividing cells
• elongation region - undergo enlargement
• maturation region - permanent tissues, root hairs
• epidermis - outermost layer, protection
• cortex - made up of parenchyma cells, for storage
• stele - central cylinder
• pericycle - cells are actively dividing and giving rise to lateral roots
• stem - originates from epicotyl which to elongate and orient the shoot - to elevate reproductive structures
• herbaceous stem - soft/green: small diameter: covered with epidermis
• woody stem - tough/not green: grows in height: covered with cork
• nodes - where leaves and branches originates
• lenticels - tiny pores for gaseous exchange
• leaf scars - marks left by fallen leaves
• buds - masses of meristematic tissues
• bud scales - cover and protect the buds from drying
• bud scars - left by fallen bud scales
• leaf - major site of photosynthesis, most active part of the plant
• phyllotaxy - arrangement of leaf on the stem
• spiral - onle one leaf attached to each node
• opposite - 2 leaves attached to node in opposite manner
• whorled - 3 or more leaves attached to a node
• simple - single leaf blade attached to a petiole
• compound - several leaflets attached to a petiole
• leaf venation - the arrangement of veins on the underside of a leaf
• parallel - veins are equidistant
• netted - veins that branch into veinlets
• entire - margin witg a smooth edge
• serrate - margin saw-toothed edge
• lobed - indentions edge