CHAPTER 7 TISSUES
INTRODUCTION Till now wwe studied that all the organisms are made of cells. CYTOPLASH NUCLEUS F00 PARTICLE on the basis of cell they are divided into unicellular (single-celLed) and/or mulkicellular (two or more celled). ASENUAL REPROTDUCTION SINGLE CEL DIVIDING CELLS NTO Two DROGATER AN AR Example-Amoeba (unicellular), in case of amoeba all the functions are carried out by the single celL, whether it is digestion, excretion, respiration, but in case of human beings or plants (multicellular), all these functions are assigned to different cells rather different tissues or organs or organ systems, DIFFERENT TISSUES FOR DIFFERENT TISSUES MULTICELLULAR
Now the question here arises "Ho the cells form mulkicel Lular organisms? Hou they are connected to eack others? What are the tissues? How they are formed? ete. lls | Tissues - Organs- System | The cells of multicellular organisms grow and divide and form small groups of cells, these groups of cell combine groups of cell com and specialize each other for specific function of the body These groups or clusters of cells are called tissues. Epithelial cell Epithelial tissue Stomach Small intestine Smooth muscle cellEpithelial tissue Similarly, tissues form groups and combine to form organs and organs then form organ systems. Digestive system
The name tissue was coined by Grew. Why tissues are The group of cells with similar in origin, structure and function are called tissues. important? ANS: Histology the study of tissues. issues are what It is one of the building blocks of an makes up our bodies An organism is comprised of tissues, bo These cells share a similar structure considered to be a organism (animal or plant) everything from our bones to organs Like which are made up of individual cells. our heart and brain! E ven blood ts (how theyre built) and function (what tissue they do). SSUe
TYPES OF TISSUES Types of tissues The tissues are divided into plant tissues and animal tissues. TISSUES ANIMAL TISSUES MERISMATIC TISSUES PERMANENT TISSUES EPITHELIAL CONNECTIVE MUSCULAR NERVOUS SIMPLE COMPLEX
PLANT TISSUES . PLants are stationary and are fixed to their place; they dont move and have Limited growth GNUCLEoS CYTOPLASM Plants have special supportive ssues which provide them structural strength. PLANT TISSUES Most of the plant tissues are dead . The dead ceLLs pro vide mechanical strength to the plants.
ANIMAL TISSUES Animals move around in search of food and shelter. CARDIAC MUSC LE CELL NEURON ceLL . Animals consume more energy as compared to plants. SKELETAL MUSCLE CEL Most of the animal tissues are living. The structural organization of organ COLUMNAR EATHELIAL AND GOBLET CEus and organ system is more complex in animaLs SURFACE SKIN CEus BLOOD CELS Animal tissues are divided into four ANIMALTISSUE types
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