What is a leaf made up …

The leaf is a collection of tissues which include: The epidermis which covers the upper and lower surfaces. The mesophyll inside the leaf which is rich in chloroplasts. The veins contains the vascular tissue (where xylem and phloem are present). A leaf is made of many layers that are sandwiched between two layers of tough skin cells (called the epidermis). The epidermis also secretes a waxy substance called the cuticle. These layers protect the leaf from insects, bacteria, and other pests.

The leaf is the primary photosynthetic organ of the plant. It consists of a flattened portion, called the blade, that is attached to the plant by a structure called the petiole. ... The vascular tissue, xylem and phloem are found within the veins of the leaf. Leaves provide food and air to help a plant stay healthy and grow. Through photosynthesis, leaves turn light energy into food. Through pore, or stomata, leaves “breathe” in carbon dioxide and “breathe” out oxygen. ... In this experiment, kids will test what happens to a leaf when covered with different materials.

A leaf is made of many layers that are sandwiched between two layers of tough skin cells (called the epidermis). The epidermis also secretes a waxy substance called the cuticle. These layers protect the leaf from insects, bacteria, and other pests. The leaf is the primary photosynthetic organ of the plant. It consists of a flattened portion, called the blade, that is attached to the plant by a structure called the petiole. The vascular tissue, xylem and phloem are found within the veins of the leaf.