The Different types of Ergastic Materials of a Cell

The Different types of Ergastic Materials of a Cell

Dear Viewers: Today we will discuss about the The Different types of Ergastic Materials of a Cell Ergastic materials:  These are the non-living materials found in cells, which includes Reserve materials, Secretory products and Excretory products. So all nonliving inclusions of the cell are called Ergastic materials These ergastic materials are found in cytoplasm and vacuole These are of three types   Reserve food matters Plants reserve carbohydrates in the form of starch and glycogen in fungi only Plants reserve protein in the form of aleurone grains Plants reserve fat in the form of elaioplast   Animals reserve carbohydrate in the form of glycogen Animals reserve fat in the adipocyte cells or fat cells   Secretary substances Like Nector, Colouring materials (pigments) Hormones, Enzymes, etc are secreted by plant cells and animals cells   Excretory products These are formed within the plant cells and animal cells due to metabolism. These metabolic byproducts are the excretory products.  In plants these excretory products can be nitrogenous or non-nitrogenous.  These excretory products have got considerable economic importances.   Non-nitrogenous...
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Plant Tissue System and Their Function

Plant Tissue System and Their Function

Hi viewer Today we will discuss about the types of Plant Tissue System and their function, which is very tedious to remember.  So what we are going to do, we will try to understand the points in Telegraphic language, which we will elaborate in examination hall.  Now let us check out what are there in Plant tissue system Plant Tissue system Definition Group of tissues performing a common function constitutes a tissue system.   There are three types of Tissue System in plant, which are in the following Epidermal tissue system Ground tissue system Vascular tissue system     EPIDERMAL TISSUE SYSTEM   Characteristic features Basically epidermal tissue system is present in root and stem In stem it is called epidermis, which is covered by cuticle. Cuticle is waxy in nature In root it is called epiblema, which is devoid of cuticle The epidermal outgrowths or hairs in stem are multicellular Stomata are present in leaves It is derived from Protoderm Function Gives protection to the inner delicate tissues Chloroplast containing epidermal...
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Structure Function and Location of Animal Tissue

Structure Function and Location of Animal Tissue

Hi viewer: Today we will discuss about animal tissues in a telegraphic language to understand it lucidly.  The explanation of  the topic you will get in our YouTube Channel. So let us start with the structure function and location of animal tissue: ANIMAL TISSUE Epithelial Tissue Characteristic Features In the epithelial tissue, the cells are embedded on the basement membrane. In the epithelial tissue, blood vascular system is absent. It develops from the ectoderm. Cells are closely packed with no intercellular spaces. The cell possesses prominent nucleus granular cytoplasm and no vacuole.   Squamous Epithelial Tissue Cells are arranged like tiles in a mosaic fashion or like scales. Nucleus is prominent. Cells membrane is prominent. Cells are thin, flat and irregular in outline   Location: It is present in the inner walls of the lips, in the inner walls of Alveoli of the Lungs, Bowman’s Capsule of Nephron, inner linings of Blood Vessels, and in the Peritoneum Functions This tissue acts as the covering membrane Hence it gives protection to the...
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Different types of Plant Tissues and their Functions – Class 8

Different types of Plant Tissues and their Functions – Class 8

Hi Viewers: Today we are going to discuss about the different types of Plant Tissues and their Functions.  To remember all the important points in this article we will use the telegraphic language.  PLANTS TISSUE What is a Tissue? Ans.  An organised mass of cells of similar structures , similar origin and similar function.   PLANT TISSUE: A) Meristematic Tissue B) Permanent Tissue: a)  Simple Permanent Tissue: Parenchyma Collenchyma Sclenchyma: i)  Stone Cell     ii)  Fibre C) Complex Permanent Tissue: Xylem:   Tracheid.   Trachea.   Xylem Parenchyma. Xylem Fibre. Phloem: Companion Cell. Sieve Tube. Phloem Parenchyma. Phloem Fibre.   Meristematic Tissue   Structure Cells are living Hexagonal in shape. No inter-cellular space. Nucleus is prominent. Vacuole are small in size. Cell wall is thin. Protoplasm is granular. Retains the power of cell division.   Function It helps the plants to increase in height and girth.   Location A) Apical meristem- Present at the apex of stem and root B) Intercalary meristem- Present in between the permanent tissues C) Lateral meristem- Present at the lateral side of root and stems    Permanent Tissue: A)  Simple Permanent Tissue:   Parenchyma All...
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Structure and Function of Cytoplasmic Organelles of Cell

Structure and Function of Cytoplasmic Organelles of Cell

Hi Viewers: Today we are going to discuss a very important aspect of Structure and Function of Cytoplasmic Organelles of Cell.  These Cytoplasmic organelles are present both in plant cells and in animal cells.  Now let us check out what cytoplasmic organelles are present in the plant cells and in animal cells.  On that basis we will be able to differentiate between the plant cells and animal cells. What is Cytoplasmic Organelles?   All the tiny living inclusions present within the cytoplasm is called cell organelles.      Nucleus   Nucleus is double membrane bound dense spherical body, containing nuclear reticulum, nucleolus and nucleoplasm   Structure:  Under electron microscope the nucleus shows the following structures   Nuclear Membrane: it is delicate, it is porous, it is double layered, its function is to separate nucleus from the surrounding cytoplasm Nucleoplasm: it is dense, its mass is clear, it forms the matrix of the nucleus, its function is to store reserve materials for the cell division Nuclear Reticulum: it is highly coiled structure which...
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Differences Between Cell Wall and Cell Membrane

Differences Between Cell Wall and Cell Membrane

Hi Readers: Today we will discuss about the Differences Between Cell Wall and Cell Membrane. While doing that we will focus on to its structure, function, and location only.  So without further ado, let's get started.....   CELL WALL Differences Between Cell Wall and Cell Membrane have the following: First let us go through the definition: The non-living, Permeable, rigid and thick outer envelope of plant cell composed of Cellulose, Hemicellulose, Lignin, Pectin and Suberin is known as cell wall. Check out the Video explanation from our YouTube Channel: To see more videos like this please click here The Structural features of a cell are as follows:    It is present only in plant cell It is composed of composed of Cellulose, Hemicellulose, Lignin, Pectin and Suberin Matured cell wall is composed of two parts, which are in the following Primary cell wall:  It is the thin outer most layer Secondary cell wall:  It is thick inner layer A cementing layer called middle lamella is present between two adjacent cells Narrow thread...
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Differences between Prokaryotic and Eukaryotic cells

Differences between Prokaryotic and Eukaryotic cells

Hi Readers:   Today we will discuss about the Differences between Prokaryotic and Eukaryotic cells.  So let's dive into it.. Prokaryotic Cells: Pro means primitive and karyon means nucleus.  So the cell which bears the primitive Nucleus is called prokaryotic cells.   Definition:  The primitive type of cells which are devoid of true nucleus and well defined Cytoplasmic Organelles.   Examples:  Bacteria and blue green algae like Nostoc, Anabaena etc.   Structure: Prokaryotic cells are all unicellular organism Cell walls are composed of mucopeptide Nucleus is devoid of nuclear membrane, nucleoplasm and nucleolus Cell organelles like Mitochondria, Endoplasmic Reticulum, Golgi Bodies, Plastids etc are absent Ribosomes are 70S     Eukaryotic Cells:  Eu means True and karyon means nucleus.  So the cells which bears the true nucleus is called eukaryotic cells   Examples:  Eukaryotic cells occur in plant from Algae to Angiosperms                    And                    Eukaryotic cells occur in animal from Protozoa to Human   Structure: Eukaryotic cells are may be unicellular or multicellular Cell walls are composed of cellulose Nucleus have all the four components-- Nuclear Reticulum,...
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