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Cell Structure and Functions Full Chapter Class 8 Science | NCERT Science Class 8 Chapter 8

Magnet Brains・25 minutes read

Cells are the fundamental unit of life, forming the basis of all living organisms and divided into unicellular and multicellular types. Plant cells have unique functions like root absorption, while tissues and organs are composed of cells, with distinct structures like cell membranes and nuclei.

Insights

  • Cells, the basic units of life, are akin to the building blocks of living organisms, with each cell resembling a compartment within a beehive, performing specific functions crucial for life.
  • The division of cells into unicellular and multicellular organisms showcases the complexity and diversity of life forms, highlighting the interconnectedness of cells in forming tissues, organs, and ultimately entire organisms, underscoring the significance of cellular structures and functions in sustaining life.

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Recent questions

  • What is the fundamental unit of life?

    Cell

  • What is the protective covering of a cell?

    Cell membrane

  • What are the key components of a cell's structure?

    Cytoplasm and nuclei

  • What are the thread-like structures responsible for character transmission in a cell?

    Chromosomes

  • What is the distinction between plant and animal cells?

    Presence of plastids in plant cells

Related videos

Summary

00:00

Origin and Function of Cells in Biology

  • The word "cell" originated from the farmer's activity, leading to its discovery by scientists like Robert Hooke.
  • Cells are partitioned compartments resembling a beehive, with each compartment called a cell.
  • Cells are the fundamental unit of life, akin to a tree being the basic material for a building.
  • Unicellular organisms like amoeba, paramecium, and white blood cells perform various functions.
  • Cells can divide into two parts, leading to multicellular organisms like humans.
  • The cell membrane acts as a protective covering, shaping and defining the cell.
  • Plant cells have different functions, such as roots absorbing water and nutrients.
  • Tissues are made up of cells, forming organs like the digestive and respiratory systems.
  • Organs are made up of tissues, with the term "organ" originating from the Latin word for instrument.
  • An activity involving onion pieces under a microscope reveals the structure of cells, with cytoplasm and nuclei being key components.

19:39

Cell Structure and Function in Biology

  • Doctor should get the color and put a cover flip over it
  • AB was done on the structure seen inside the microscope, which was Sudarshan, resembling animals
  • Removal of what is coming out of Abhi's body, followed by the second one
  • Explanation of Cell Membrane, its protection function, and its difference from the nucleus
  • Chromosomes are thread-like structures inside the nucleus responsible for character transmission
  • Description of the structure of the cell, including mitochondria and endoplasmic reticulum
  • Differentiation between plant and animal cells, focusing on the presence of plastids in plant cells
  • Explanation of the green color in plant cells due to chlorophyll in chloroplasts
  • Details on the nucleus, nuclear membrane, and chromosomes for character transmission
  • Distinction between eukaryotes and prokaryotes based on the presence of a cell membrane and nucleus
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