- Petiole: Petiole is also known as leaf stalk.
- Lamina: Lamina is also known as leaf blade.
- Midrib: Midrib is also known as main vein of the leaf.
- Leaf margin: Leaf margin is also known as leaf edges.
- Leaf apex: Leaf apex is also known as leaf tip.
- Veins: Leaf veins branch from the midrib of the leaf.
What are the parts of a leaf and its function?
01/07/2020 · External part of a leaf includes Leaf Blade is a Wide flattened area of leaf for concentrating sunlight on photosynthetic cells. Petiole that Short stem that attaches leaf to main stem or branch. Veins is a Vascular bundles within leaf for transort. Node is a Growth region of stem where leaves or new branches arise.
What is the function of the epidermis of a leaf?
29/01/2015 · Main External Parts of A Leaf and functions. palmately compound leaf has all its leaflets attached to a common point. A pinnately compound leaf has multiple leaflets attached along a rachis or. axis. Conifers have three different types of leaves.
What is the function of veins in a leaf?
It helps in transporting water and nutrients absorbed by the roots to the leaves. Helps to transport prepared food ( photosynthetic products) from the leaves to the rest of the plant. Helps trees lose their leaves in the fall. Lamina: The lamina is the flat and green part of the leaf with veins and veinlets.
What is the function of the guard cells in a leaf?
31/03/2020 · Veins: Leaf veins branch from the midrib of the leaf. Also, what are the external parts of a leaf and their functions? Structure of a leaf 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.
What are the external part of the leaf?
Ans. Petiole, leaf base, lamina, leaf apex, and leaf margin are the external parts of a leaf.
What are the internal parts of a leaf and their functions?
Structure-Function Relationship: LeavesName of StructureStructureFunctionPithParenchyma with vacuoles and plastidsStorage, supportPlasmodesmataOpenings between sieve tubes connecting cytoplasmTransport of sapSpongy cellsRounded, widely spaced, near stomataAllow gas exchangeSuberinWaxy moleculeWaterproofing9 more rows•11-Dec-2015
What are the external parts of the plant?
EXTERNAL PLANT PARTS DEFINITION. Plants have external parts that help them grow, survive and reproduce. These parts include the stem, leaves, flower, fruits and roots. Many plant parts are eaten by people.
What are the four functions of a leaf?
CONTENTSPhotosynthesis.Transpiration.Guttation.Storage.Defense.19-Aug-2017
What are the 3 main functions of a leaf?
(1) The leaves make food for the plant by photosynthesis. (2) The leaves get rid of excess water from the plant through transpiration. (3) The leaves carry out the process of respiration in plants. The leaves make food for the plant by the process of photosynthesis.30-Nov-2021
What are the internal and external parts of a leaf?
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.
What are the 5 main parts of a plant and their functions?
The different parts of a plant include roots, stems, leaves, flowers, seeds, and fruits. Roots have the function of absorbing water and minerals from the soil whereas the primary functions of stems are supporting, transporting, storing, and reproducing.
What are the functions of roots stems and leaves?
The water and nutrients that were taken in by the roots, move upward through the stem to the leaves. The leaves take sunlight and carbon dioxide from the air and convert the nutrients to plant food. This process is called photosynthesis. We eat the leaves of some plants such as lettuce and spinach.
What are the types of lines?
In geometry there are four types of lines: Horizontal Line Vertical lines Parallel lines Perpendicular lines
What is a ray?
A ray is a part of a line with one endpoint (i.e., starting point) and continues forever in the other direction.
What is perpendicular lines?
When two straight lines meet or intersect at an angle of 90 degrees, they are perpendicular to each other.
What is parallel lines?
Parallel lines are two straight lines that are always the same distance apart. They never meet or intersect at any point, even at infinity.
The stalk of leaf is called A. Sessile B. Plumule C. Stipule D. Petiole
Petiole is the stalk of a leaf that attaches the blade to the stem. In petiolate leaves, the leaf stalk is long. It is the structure through which...
Main function of leaf is _____. A. Transpiration B. Exchange of Gases C. Photosynthesis D. Cooling
The main function of leaf is photosynthesis. It produces food for the plant. It has a photosynthetic pigment chlorophyll which converts solar energ...
Petiole part of the leaf is also known as?
The foliage leaf consists of three parts, namely leaf base, petiole and lamina. The leaf base is also called as hypopodium. The petiole part of the...
Explain the internal structure of the leaf?
Leaf part contains cuticle present in the upper layer which protects plants from drying out by reducing of water loss, upper epidermis consists of...
What is the most important part of a plant?
The leaf is one of the most important parts of a plant. Leaves are responsible for producing food for the plant through a process called photosynthesis. The leaves of different plants vary widely in size, shape, and color.
What are the parts of a leaf called?
There are mainly three parts of a leaf: Leaf Base, Petiole. Lamina. Leaf Base: It is the lowermost part of a leaf. Leaf Base connects to the petiole, and petiole connects to the lamina. Petiole: The thin stalk with which leaf is attached to the stem is called petiole. The petiole is commonly known as leaf stalk.
What is the role of lamina in a tree?
Helps to transport prepared food ( photosynthetic products) from the leaves to the rest of the plant. Helps trees lose their leaves in the fall. Lamina: The lamina is the flat and green part of the leaf with veins and veinlets.
What is the leaf margin?
Leaf Apex – the tip of the leaf blade, Leaf Margin – the boundary (edge) of the leaf and, Main Leaf Veins – In the middle of the lamina (leaf blade), a prominent mid-rib or main vein connects with the petiole. Secondary Leaf Veins: The veins branching from the primary vein are called secondary veins.
What is the arrangement of veins and veinlets in the lamina of the leaf called?
The arrangement of veins and the veinlets in the lamina of the leaf is called venation . You can see different types of venation in different plants. But generally, there are TWO types of venation. Reticulate Venation: When the veinlets are irregularly arranged and form a network called reticulate venation. E.g.
What are some examples of simple leaves?
In other words, there are no incisions or cuts in the lamina. Even if there are minor divisions, they do not touch the midrib and divide the lamina. Examples: Maple, oaks, banana, guava, mango etc.
What is the process of making food for plants?
Photosynthesis: The leaves make food for the plant by the process of photosynthesis. The leaf is also known as the food factory of the plant. The leaves contain chloroplast, which is filled with a green pigment called chlorophyll.
Why are leaves called the kitchen of plants?
A leaf is actually called ‘the kitchen of the plant’. This is because they are the main organ responsible for photosynthesis, through which the plant produces its energy a.k.a. it’s food. They obtain their green color due to the presence of chlorophyll. Let us learn more about them.
What is the organ responsible for photosynthesis?
Leaf. A leaf is the green, flat lateral outgrowth in plants. They come in different shapes, sizes, and colors, and are generally dorso-ventrally flattened and thin. They are the main organ responsible for photosynthesis as they contain chlorophyll.
How is prepared food transported to the other parts of the plant?
The prepared food is transported to the other parts of the plant via phloem tissue. Helps the plant breathe: The epidermis of the leaf contains guard cells that control and regulate the small pores on the undersurface of the leaves. These pores are called stomata.
Which veins run parallel to each other?
Parallel: The veins on the leaf blade run parallel to each other maintaining the same distance throughout. Palmate: The veins originate at a point and diverge from the point similar to the palm of the hand. Pinnate: There is a midrib which is present in the middle of the leaf blade.
Where are vascular tissues found in a leaf?
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.
What are the two 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. It is in this layer that photosynthesis occurs. It contains a prominent midrib at the center of the leaf blade which is the main vein.
Which layer of the body secretes waxy substances?
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.
Definition of Leaf
Leaf is a flat, lateral, green growth developing from the nodal region of the stem. There is always a bud in its axil (the angle between the leaf and the stem) that later develops into a branch. The process of photosynthesis takes place in leaves as chlorophyll and stomata are mainly found in these.
Parts of a Leaf
A typical leaf has three main parts that are mentioned in detail below:
Functions of a Leaf
Leaves are the most important part of the plant as many metabolic activities like preparation of food, exchanges of gases, and transpiration occur in these. Let’s discuss these functions in a little more detail:
Venation
The arrangement of veins and veinlets in the lamina of the leaf is called venation. Midrib, vein and veinlets contain vascular tissues like xylem and phloem for conduction of water, mineral salts and food. There are mainly two types of venation seen in leaves:
Phyllotaxy
The arrangement of leaves on a stem or branch is called phyllotaxy. It helps to avoid overcrowding of leaves and allows leaves to receive the maximum amount of sunlight for photosynthesis. There are three types of phyllotaxy:
Modifications in a Leaf
Leaves of plants are modified in various ways to perform additional functions in addition to their main function like photosynthesis. Some of them are mentioned below:
Significance of Leaf
Leaf holds a very important role in the growth and development of a plant. Some significance of leaf are mentioned below in brief:
Why are plants important?
Plants are an important part of human life and vegetation as well. They are very beneficial to us and give us a lot of things. We are surrounded by plants, but have you ever stopped to notice the parts of a plant? All parts of plants are important and carry out different functions. All of them come together to perform their respective functions ...
What is the function of roots?
This underground part plays a very important role in pulling the water and minerals so they can reach the plant. Furthermore, it also expands within the ground so that for better water absorption the water increases.
Why do plants have leaves?
The leaves of the plant help in photosynthesis. Moreover, they help in removing any excess water via stomata. In short, it is for transpiration. Moreover, some plants have leaves which also assist in the process of reproduction. Thus, leaves perform a number of functions, which helps the plant grow healthier.
What is the role of roots in soil?
Roots also play the role of anchors which helps in creating better stability. In addition, the roots also fuse the development of the plant and stock reserve food material. They also store food that binds the soil together.
Why do flowers attract insects?
The petals attract insects and birds in order to pollinate them. After that, the flower buds are protected by sepals. Similarly, the stamens which are the male part and the pistil that is the female part help in the reproduction system.
What is the stem of a plant?
The stem is the part that stays above the ground. A stem usually bears leaves, fruits plus flowers. It distributes the nutrients and minerals all the way from the plant to the leaves. Furthermore, the stem is the support system of the plant. Moreover, it shields the plant and assists in asexual dissemination.
What are the three parts of a leaf?
Moreover, the veins of a leaf allow the flowing of nutrients plus water. A leaf has three basic parts which are petiole, leaf base and lamina. The leaves of the plant help in photosynthesis.
