Question

explain the parts of the leaf​

Answer 1

Answer:

Each leaf consists of the following layers.

•Epidermis: It is the outermost layer and secretes a waxy substance called the cuticle. The cuticle helps retain water inside the leaf cells. The epidermis houses the guard cells which regulate the movement of water into and outside the cell. Guard cells do so by controlling the size of the pores also called stomata.

•Mesophyll: This forms the middle layer of the leaf. It is differentiated into two layers depending on the type of cells found: palisade and spongy mesophyll layers. It is in this layer that the chloroplasts are found. Chloroplasts are cell organelles that contain chlorophyll which is required for photosynthesis. The vascular tissues of the leaf are contained in the irregularly arranged spongy mesophyll cells.

•Vascular Tissue: The vascular tissue is actually found in the veins of the leaf. The vascular tissues are composed of xylem and phloem which are responsible for the transport of water and food.

Answer 2

These are the layers that make up each leaf.

• Epidermis: The epidermis is the outermost layer, which secretes a waxy material known as the cuticle. The cuticle aids in the retention of water within the cell walls of the leaf. The guard cells, which control the flow of water into and out of the cell, are found in the epidermis. The size of the pores, also known as stomata, is controlled by guard cells.
• Mesophyll: Mesophyll is the leaf's middle layer. The palisade and spongy mesophyll layers are distinguished based on the type of cells present. Chloroplasts can be found in this stratum. Chloroplasts are the organelles of cells that contain chlorophyll, which is necessary for photosynthesis. In the irregularly organised spongy mesophyll cells, the leaf's vascular tissues are enclosed.
• Vascular Tissue: The vascular tissue of the leaf is located in the veins. Xylem and phloem are the constituents of vascular tissues.