INTRODUCTION TO ANIMAL TISSUES
03 March 2021 00:32
• Biomolecules---> Cell---> Tissues---> Organs---> Organ system--->
Organism
• Biomolecules are the molecules of living system.
• Several biomolecules combine in a specific fashion and by
involving in several reactions form a living identity known as cell.
• Group of similar cells having same origin that are combined in
order to form a specific function is known as tissue. Example:
epithelial tissue.
• These tissues are organised in specific proportion and pattern to
form an organ like stomach, lung, heart and kidney
• When two or more organs perform a common function by their
physical and/or chemical interaction, they together form organ
system, e.g., digestive system, respiratory system, etc.
• In unicellular organisms, all functions like digestion, respiration
and reproduction are performed by a single cell. In the complex
body of multicellular animals the same basic functions are
carried out by different groups of cells in a well organised
manner.
• Hydra is made of different types of cells and the number of cells
in each type can be in thousands.
• Cells, tissues, organs and organ systems split up the work in a
way that exhibits division of labour and contribute to the
survival of the body as a whole.
• "Tissues" come from French word meaning "woven".
• The term Histology was given by "Mayr"
• "Bichat" coined the term "tissue".
• Histology is the study of tissues.
• Father of animal histology microscopy is "Marcello Marphigi".
• The structure of the cells vary according to their function.
Therefore, the tissues are different and are broadly classified
into four types : (i) Epithelial, (ii) Connective, (iii) Muscular and
(iv) Neural.
• N-Grew gave the term w.r.t plant tissues whereas Bichat gave
the term w.r.t. animal tissues. * An
organ can be glandular
ZOOLOGY Page 1
03 March 2021 00:32
• Biomolecules---> Cell---> Tissues---> Organs---> Organ system--->
Organism
• Biomolecules are the molecules of living system.
• Several biomolecules combine in a specific fashion and by
involving in several reactions form a living identity known as cell.
• Group of similar cells having same origin that are combined in
order to form a specific function is known as tissue. Example:
epithelial tissue.
• These tissues are organised in specific proportion and pattern to
form an organ like stomach, lung, heart and kidney
• When two or more organs perform a common function by their
physical and/or chemical interaction, they together form organ
system, e.g., digestive system, respiratory system, etc.
• In unicellular organisms, all functions like digestion, respiration
and reproduction are performed by a single cell. In the complex
body of multicellular animals the same basic functions are
carried out by different groups of cells in a well organised
manner.
• Hydra is made of different types of cells and the number of cells
in each type can be in thousands.
• Cells, tissues, organs and organ systems split up the work in a
way that exhibits division of labour and contribute to the
survival of the body as a whole.
• "Tissues" come from French word meaning "woven".
• The term Histology was given by "Mayr"
• "Bichat" coined the term "tissue".
• Histology is the study of tissues.
• Father of animal histology microscopy is "Marcello Marphigi".
• The structure of the cells vary according to their function.
Therefore, the tissues are different and are broadly classified
into four types : (i) Epithelial, (ii) Connective, (iii) Muscular and
(iv) Neural.
• N-Grew gave the term w.r.t plant tissues whereas Bichat gave
the term w.r.t. animal tissues. * An
organ can be glandular
ZOOLOGY Page 1
