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Tissues | Class 9 Science | CBSE | Chapter 5
What are Tissues? how many types of tissues are derived? Are plants and animals made of the same tissues? such im[portant questions are solved in this chapter.
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Full Chapter Overview
Division of Labour, Plants vs Animals, Classification: Plant Tissues; Merismatic Tissue, Permanent Tissue – Simple – Parenchyma, Simple – Collenchyma, Simple – Sclerenchyma, Simple – Epidermis, Aerial Epidermis, Root Epidermis, Simple – Cork, Permanent – Complex-Complex – Xylem, Complex-Phloem, Revision, Plant Tissue, Experimental Study of Stem, Experimental Study of Epidermis, Types of Animal Tissue, Muscular Tissue – Types, Nervous Tissue, Connective Tissue – Bones, Cartilage, Tendon & Ligament, Areolar, Adipose, Blood, Lymph, Epithelial Tissue – Types.
Let’s start with what is Tissue?
Tissue
A group of cells that work together to perform a particular function is called Tissue.
Division of Labour/ Cell specializing
In Unicellular or simple organisms, all body functions are by the single-cell itself like Amoeba,
In amoeba, all body functions are done by a single cell.
but in multicellular or complex organisms (like in humans, plants, etc.), different groups of cells perform different functions.
In multicellular organisms, different groups of cells perform different functions.
As different groups of cells or tissues are specialized in doing a different job, any work is done much more efficiently compared to a unicellular organism.
The advantage of the division of labor in multicellular organisms :
A different group of cells is specialized in doing a different job, so any work is done much more efficiently compared to a unicellular organism.
Difference between Plant Tissues and Animal Tissues:
Plant Tissues
– Plants are fixed.
– Nonuniform growth.
– Plants obtain food by photosynthesis.
– Plants have a simpler body structure.
Animal Tissues
– Animals have to move for food shelter, etc
– Uniform growth.
– Animals depend on other animals & plants for food.
– Animals have complex body structures.
Now, let’s explore Plant Tissues.
Plant tissues are classified as below division.
Plant tissue mainly divides into 2(two) parts.
1) Merismatic Tissue – its also divides into 3(three) parts as,
a) Apical
b) Lateral
c) Intercalary
2) Permanent Tissue – it’s also divided into 2(two) parts as,
a) Simple
b) Complex – i) Phloem ii) Xylem
Simple is further explore in,
a) Parenchyma
b) Collenchyma
c) Sclerenchyma
d) Protective – i) Epidermis, ii) Cork
This is how Plant tissues classified in different parts.
All the above-mentioned topics are described in an interactive and efficient manner so that the students could easily understand them.
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#Tissues #MerismaticTissue #PermanentTissue #class9
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