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Basic concepts of cell and it’s structures.

Subject:

Science  

Grade:

3  

First Class

 

THE CELL

Is the functional and structural unit of all living things, the cell is the smallest part of all living things, and performs vital functions such as: nutrition, respiration and growth, and also, cells can reproduce.

THE PLANTS HAVE CELLS

Plants as living things are made up of basic units called cells. The cells perform all the functions that allow plants to live.

The cells are formed by a series of structures that are:

  • Cell membrane
  • Cell wall
  • Cytoplasm
  • Nucleus
  • Chromosomes
  • Plastids
  • Mitochondria
  • Vacuole
  • Golgi apparatus
  • Ribosomes
  • Smooth and Rough Endoplasmic reticulum

CELL MEMBRANE

Is the protective cover of the cell which allows entry and exit of substances.

CELL WALL

It gives protection and support to the cell

CYTOPLASM

It is a gel-like substance inside the cell, where you will find the organelles which carry out the vital processes of the cell

NUCLEUS

Controls all the activities of all cells, It’s like the brain of the cell. They can have different shapes and be located in different parts.

CHROMOSOMES

Have the information of all the characteristics of plants

PLASTIDS

They are involved in the process of photosynthesis and determine the color of fruits and flowers. There are three types of plastids, chloroplasts, chromoplasts and leucoplasts.

CHLOROPLASTS: It gives the green color to plants and it’s the responsible for manufacturing the plant food

CHROMOPLASTS: Are the responsible for the yellow, orange and red color of the plants

LEUCOPLASTS: They are only found in the cells of adult plants that are not exposed to light

MITOCHONDRIA

They are organelles that act like a digestive system that takes in nutrients, breaks them down, and creates energy for the cell.

VACUOLE

There are bags where the cells retain water and other waste materials

GOLGI APPARATUS

Is the responsible of preparing the materials inside the cell to be sent outside.

RIBOSOMES

They are responsible for producing the cell proteins

ENDOPLASMIC RETICULUM

Its main function is to intervene in the synthesis of proteins and intracellular transport

ROUGH: Intervenes in the synthesis of proteins and intracellular transport and has ribosomes attached to his membrane

SMOOTH: Does not have ribosomes. Is also involved in cellular transport and lipid synthesis

 

 (Plant cell draw)

HOMEWORK

Bring to the next class eighth of cardboard and colored plasticine.

Second class

 

THE ANIMALS HAVE CELLS

The animals are composed by cells highly organized. The animal cells have characteristics that differentiate them from plants cells.

STRUCTURES OF THE ANIMAL CELL

  • Cell membrane
  • Cytoplasm
  • Nucleus                                              
  • Nucleolus
  • Mitochondria
  • Vacuole
  • Lysosomes
  • Ribosome
  • Golgi apparatus
  • Smooth and Rough Endoplasmic Reticulum


 

LYSOSOMES

Lysosomes are involved in cellular digestion (are the stomach of the cell), they

 

 

 

ACTIVITY

STRUCTURE          FUNCTION          ANIMAL          PLANT

Nucleus


Mitochondria


Lysosomes


Cell Wall


Ribosomes


Chloroplasts

 

ACTIVITY

In the eighth of cardboard, made a diagram of the animal cell and its organelles.

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