What is the underside of a leaf?
stomata
stomate, also called stoma, plural stomata or stomas, any of the microscopic openings or pores in the epidermis of leaves and young stems. Stomata are generally more numerous on the underside of leaves.
What is the bottom of a leaf called?
lower epidermis
We know that the bottom of the leaf is the lower epidermis. Within this layer we can see the stomata, which are the openings. These are surrounded by two guard cells that regulate the opening and closing of the stomata.
Where is leaf base in a leaf?
The leaf base is the slightly expanded area where the leaf attaches to the stem.
Why are stomata located on the underside of the leaf?
If the stomata are present on the plant’s lower surface, they will be less exposed to the sun and more protected from the breeze. Transpiration is the loss of water through stomata, hence the lower surface has more stomata to prevent excessive water loss.
What are the internal parts of a leaf?
Leaves have two main parts: The leaf blade and the Stalk or the petiole.
- The leaf blade: It is also called the lamina. It’s generally broad and flat.
- The petiole: It is the stalk-like structure which connects the leaf blade to the stem. The petiole has tiny tubes, that connect the veins on the leaf blade to the stem.
Where are stomata located?
leaves
The stomata are most common on green aerial parts of plants, particularly the leaves. They can also occur on stems, but less commonly than on leaves.
What are parts of a leaf?
Apex: tip of the leaf • Margin: edge of the leaf • Veins: carry food/water throughout leaf; act as a structure support • Midrib: thick, large single vein along the midline of the leaf • Base: bottom of the leaf • Petiole: the stalk that joins a leaf to the stem; leafstalk • Stipule: the small, leaf-like appendage to a …
What are the parts of internal structure of a leaf?
The internal structure of the leaf is protected by the leaf epidermis, which is continuous with the stem epidermis. The central leaf, or mesophyll, consists of soft-walled, unspecialized cells of the type known as parenchyma. Oxygen is passed into the atmosphere through stomata—pores in the leaf surface.
Where is the base of a plant?
A ‘base’ is defined as the ‘lowest or bottom part of an object on which it stands’ or the ‘main part to which other parts are added’. In biology, ‘base’ means the part of a plant or animal organ that is near the point of attachment to the ground or to a more basal part of the body.
What are stomata located on the bottom of a leaf?
Transpiration is the loss of water through stomata, so, more stomata are found on the lower surface to prevent excessive loss of water.
What are the internal and external structure of a leaf?
Leaves have two main parts: The leaf blade and the Stalk or the petiole. The leaf blade: It is also called the lamina. The petiole: It is the stalk-like structure which connects the leaf blade to the stem. The petiole has tiny tubes, that connect the veins on the leaf blade to the stem.
What are the structures of a leaf?
Each leaf typically has a leaf blade ( lamina ), stipules, a midrib, and a margin. Some leaves have a petiole, which attaches the leaf to the stem; leaves that do not have petioles are directly attached to the plant stem and are called sessile leaves.
What is stomata in a leaf?
Stomata is the plural word for stoma. These are the pores of a leaf, sometimes called the “mouth,” which facilitates the exchange of gases (carbon dioxide and oxygen). The term includes all the anatomical parts that make up the stomatal complex, which is necessary for the respiration of a plant and also used in photosynthesis.
What is the structure of a plant leaf?
Leaf structure. Leaves of most plants include a flat structure called the blade or lamina, but not all leaves are flat, some are cylindrical. Leaves may be simple, with a single leaf blade, or compound, with several leaflets.
What is leaf anatomy?
LEAF ANATOMY. 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. Sometimes leaves are divided into two or more sections called leaflets.
What is a leaf plant?
A leaf is an organ of a vascular plant and is the principal lateral appendage of the stem. The leaves and stem together form the shoot.