Plant Tissues
Parenchyma
Parenchyma cells make photosynthesis in the stems and green parts of plants. Varieties: palisade and spongy.
Cambium and Cork Cambium
Both are secondary meristems. The internal cambium and the vascular cambium produce conducting tissues: towards the center, xylem (secondary xylem); outwards, phloem (secondary phloem). The cork cambium produces external cork tissue and the internal phelloderm, which travel towards the parenchyma cortex.
Collenchyma
Collenchyma cells are found in young parts of plants. They are vivid, elongated, prismatic cells containing chloroplasts, with thickened walls in layers. There are 3 types: angular, lamellar and lacunar.
Secretory Tissues
External
Located in the epidermis, they expel foreign substances....