The top and bottom surface of a leaf are covered with a single layer of cells known as the epidermis . A thin waxy film known as a cuticle often covers the leaf epidermis in order to slow down the escape of water vapor from the leaf. Surrounding each stoma is a pair of guard cells that open and close to allow the exchange of gases and water vapor. Sandwiched between the two layers of epidermis is the mesophyll . Chloroplasts are found in the mesophyll section of the leaf.
Chloroplasts are the factories where photosynthesis takes place.
The leaf is attached to the stem at the petiole . A network of veins carry life's necessities back and forth from the leaf to the other parts of the plant. The arrangement of these veins is helpful in identification of tree, a subject which will be addressed next month. Photosynthesis takes place in the mesophyll section of the plant where chloroplasts are found. God has designed our universe so that negatively charged electrons are drawn toward the positively charged particles called protons in the nucleus of the atom.