Cell Structure Pau Ldh
This document was uploaded by user and they confirmed that they have the permission to share it. If you are author or own the copyright of this book, please report to us by using this DMCA report form. Report DMCA
Overview
Download & View Cell Structure Pau Ldh as PDF for free.
More details
- Words: 776
- Pages: 16
CELL STRUCTURE AND CELL Class 9th Teacher Trainer Students Names Miss Harinder Kaur Anita Student TrainerMiss Rachna Ruchi Priya Under the Guidance of: Mrs. Kusum Lata (Science Mistress)
INTRODUCTION OF CELL, CELL STRUCTURE CELL :It is the structural and functional unit of living organisms.
DISCOVERY OF CELL: CELL was discovered by ROBERT HOOKE in (1665).He studied a thin piece of cork with his crude Microscope. HOOKE described That the cork is made up of hundreds of little Hexagonal boxes giving a kind of honey Comb appearance. He called these little boxes cells.
TYPES OF CELLS: 1)PROKARYOTIC CELL 2)EUKARYOTIC CELL PROKARYOTIC
CELL: There DNA is not
enclosed In a nuclear Membrane. These cell do not have a Well defined nuclear. They also lack cell Organelles E.G: bacteria, blue Green algae, Human RBC etc.
CELL SHAPE
Cells may have diverse shapes such as polyhedral (with 8,12,or 14 sides) Spherical (E.G. Eggs of many animals), spindle (E.G. Smooth muscles FIBRE), elongated (E.G. Nerve cells), branched or red blood cells.
CELL SIZE The smallest known cell is MYCOPLASMA OR PPLO. Its size is 0.1 to 0.5mm. The bacterial cell is 0.5 to 5mm,human red blood corpuscles are 7 to 20mm. The longest cell is nerve cell its size is 90100cm.ACETABULARIA a single called algae has length of 10 cm.
The largest cell is avian eggs.
types of organism with respect to cell 1 UNICELLULAR ORGANISM: Many organisms are made up of one Cell they are called UNICELLULAR E.G. amoeba, paramecium. 2 MULTI CELLULAR ORGANISM: Most of organisms are made up of Many cells are called MULTICELLUARE.G. human being. Newly born human baby has two Trillion cells. An adult man has about 100 Trillion cells.
Structure OF CELL CELL BIOLOGY: the branch of biology which deals with the study of structure and function of the cell in known as cell biology.
Cells are the smallest structures capable of basic life processes, such as taking in nutrients, expelling waste, and reproducing. The structure of cell include the protoplasm containing cell organelles, and surrounded by a membrane.
CELL WALL The chitinous wall of cellulose enclosing the cell membrane is called cell wall. It is present only in plants.
FUNCTION: it is an outer rigid protective, supportive covering of plant cells. It allows the exchange of certain materials.
CELL MEMBRANE Every kind of cell is bounded by a thin, delicate, living, and Triaminic membrane called Plasma membrane FUNCTION : 1. It protects the cell from Injury. 2. Plasma membrane binds the Semi- fluid content of the cell. 3. It allows exchange selective materials.
CYTOPLASM • The space between the plasma membrane and the nucleus is
filled by an amorphous, translucent, homogenous, colloidal liquid celled cytoplasmic matrix. it consists of various inorganic molecules such as water, salts of sodium , potassium, amino acids , carbohydrates, lipids and proteins. FUNCTION: 1.It help in exchange of materials between different cell organelles. 2.Breaking down of glucose takes place in the cytoplasm. 3.Bio synthesis of nucleotides protein and fatties take place in it.
nucleus
• The Nucleus is an important, centrally located spherical cellular component. It is bounded by two unit membranes, both forming a nuclear envelope.
FUNCTION • It directs cell differentiation • And replication • All variations due to genetic material present in it. • The chromosome present in it possess genetic information in it.
Endoplasmic Reticulum It is a complex network membrane bounded tubules that run through the cytoplasm. These are of two types: Rough E.R. containing ribosome and smooth E.R. lacking ribosome. Functions: It divides the cytoplasm into small compartments. It helps in intracellular transport hence known as circulatory system of cell.
RIBOSOMES IN eukaryotic cells, they occur free in the cytoplasm as well as attached to the outer surface of the rough endoplasmic reticulum. FUNCTION Ribosome help in Protein synthesis inside The cell. Hence they are Called protein factories Of the cell.
Mitochondria These are sausages shaped, may be granular, filamentous and rod shaped. It is bounded by two membrane a smooth outer membrane and inner folded membrane to form cristae. Functions: It helps in the oxidation of Glucose to provide energy hence called power house of the cell. It helps in the cynthesis of chlorophyll Synthesis of many amino acids take place here.
Golgi Apparatus It is present around or Above the centrioles in All eukaryotic cells in Except mammalian ‘RBC, And mature sperms. it is Absent in the prokaryotes. These are of different shapes like christnae vesicles. Function It helps in secretion of mucous, enzymes and hormones. It helps in the storage of secretary products.
INTRODUCTION OF CELL, CELL STRUCTURE CELL :It is the structural and functional unit of living organisms.
DISCOVERY OF CELL: CELL was discovered by ROBERT HOOKE in (1665).He studied a thin piece of cork with his crude Microscope. HOOKE described That the cork is made up of hundreds of little Hexagonal boxes giving a kind of honey Comb appearance. He called these little boxes cells.
TYPES OF CELLS: 1)PROKARYOTIC CELL 2)EUKARYOTIC CELL PROKARYOTIC
CELL: There DNA is not
enclosed In a nuclear Membrane. These cell do not have a Well defined nuclear. They also lack cell Organelles E.G: bacteria, blue Green algae, Human RBC etc.
CELL SHAPE
Cells may have diverse shapes such as polyhedral (with 8,12,or 14 sides) Spherical (E.G. Eggs of many animals), spindle (E.G. Smooth muscles FIBRE), elongated (E.G. Nerve cells), branched or red blood cells.
CELL SIZE The smallest known cell is MYCOPLASMA OR PPLO. Its size is 0.1 to 0.5mm. The bacterial cell is 0.5 to 5mm,human red blood corpuscles are 7 to 20mm. The longest cell is nerve cell its size is 90100cm.ACETABULARIA a single called algae has length of 10 cm.
The largest cell is avian eggs.
types of organism with respect to cell 1 UNICELLULAR ORGANISM: Many organisms are made up of one Cell they are called UNICELLULAR E.G. amoeba, paramecium. 2 MULTI CELLULAR ORGANISM: Most of organisms are made up of Many cells are called MULTICELLUARE.G. human being. Newly born human baby has two Trillion cells. An adult man has about 100 Trillion cells.
Structure OF CELL CELL BIOLOGY: the branch of biology which deals with the study of structure and function of the cell in known as cell biology.
Cells are the smallest structures capable of basic life processes, such as taking in nutrients, expelling waste, and reproducing. The structure of cell include the protoplasm containing cell organelles, and surrounded by a membrane.
CELL WALL The chitinous wall of cellulose enclosing the cell membrane is called cell wall. It is present only in plants.
FUNCTION: it is an outer rigid protective, supportive covering of plant cells. It allows the exchange of certain materials.
CELL MEMBRANE Every kind of cell is bounded by a thin, delicate, living, and Triaminic membrane called Plasma membrane FUNCTION : 1. It protects the cell from Injury. 2. Plasma membrane binds the Semi- fluid content of the cell. 3. It allows exchange selective materials.
CYTOPLASM • The space between the plasma membrane and the nucleus is
filled by an amorphous, translucent, homogenous, colloidal liquid celled cytoplasmic matrix. it consists of various inorganic molecules such as water, salts of sodium , potassium, amino acids , carbohydrates, lipids and proteins. FUNCTION: 1.It help in exchange of materials between different cell organelles. 2.Breaking down of glucose takes place in the cytoplasm. 3.Bio synthesis of nucleotides protein and fatties take place in it.
nucleus
• The Nucleus is an important, centrally located spherical cellular component. It is bounded by two unit membranes, both forming a nuclear envelope.
FUNCTION • It directs cell differentiation • And replication • All variations due to genetic material present in it. • The chromosome present in it possess genetic information in it.
Endoplasmic Reticulum It is a complex network membrane bounded tubules that run through the cytoplasm. These are of two types: Rough E.R. containing ribosome and smooth E.R. lacking ribosome. Functions: It divides the cytoplasm into small compartments. It helps in intracellular transport hence known as circulatory system of cell.
RIBOSOMES IN eukaryotic cells, they occur free in the cytoplasm as well as attached to the outer surface of the rough endoplasmic reticulum. FUNCTION Ribosome help in Protein synthesis inside The cell. Hence they are Called protein factories Of the cell.
Mitochondria These are sausages shaped, may be granular, filamentous and rod shaped. It is bounded by two membrane a smooth outer membrane and inner folded membrane to form cristae. Functions: It helps in the oxidation of Glucose to provide energy hence called power house of the cell. It helps in the cynthesis of chlorophyll Synthesis of many amino acids take place here.
Golgi Apparatus It is present around or Above the centrioles in All eukaryotic cells in Except mammalian ‘RBC, And mature sperms. it is Absent in the prokaryotes. These are of different shapes like christnae vesicles. Function It helps in secretion of mucous, enzymes and hormones. It helps in the storage of secretary products.
Related Documents
Cell Structure Pau Ldh
November 2019 17
Cell Structure 3 Pau Ldh
November 2019 9
Cell Structure 2 Pau Ldh
November 2019 8
Cell Structure Jagraon Ldh
November 2019 15
Cell Structure Samralab Ldh
November 2019 21