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ANIMAL TISSUES - Coggle Diagram
ANIMAL TISSUES
Muscle Tissues
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Structures
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Nervous Tissues
Structures
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Neurons consist of dendrites, cell body and axon
Myelin sheath has a layer of fatty material (surround the axons) and produce by Schwann cell. Function: Protects axons and provide electrical insulation
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Node of Ranvier is a small uncovered parts of axon between the myelin sheath.
Function: Site for accelerating impulse transmission.
Distribution
Brain, spinal cord and nerves
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Epithelial Tissues
Functions
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Protect external & internal body surface from microbes, chemical, dehydration and friction
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Distribution
Line inner body cavity, tubes and blood vessels
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Structures
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Arranged in continuous sheets , single or multiple layer
Type
Simple cuboidal
Function:
Secretion of hormone or saliva
Absorption (reabsorption of molecules by proximal convoluted tubule in kidney)
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Simple columnar
Function:
Secretion of enzymes, mucus and other substances
Ciliated type propels mucus or gametes by ciliary action
Absorb nutrients
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Structures:
Rectangular / tall cells
Nuclei round or oval near base of cells
Goblet cells & cells with microvilli & cilia
Simple squamous
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Connective Tissues
Leukocytes / WBC
Type:
Granulocytes(granular cytoplasm and lobed nuclei)
Agranulocytes (clear cytoplasm and nuclei not lobed)
Function:
Antibody production and other specific defense against pathogens
Lymphocyte B: involve produce antibody
Neutrophils and Monocytes: engulf foreign substances
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Erythrocytes / RBC
Structures:
Biconcave disc-shaped
Lack of nuclei
Contain hemoglobin, enzyme and inorganic ions
Function:
Transport oxygen, carbon dioxide, nutrients and waste
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Structures
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Plasma contain water, salts, dissolved proteins
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