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Tissue Structure and Function. Chapter 9 in Textbook Chapter 4 in Lab Book. Tissue. An aggregation of cells and cell products of similar structure and embryonic origin that perform a common function. Histology. The study of tissues, especially their structure and arrangement.

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Tissue Structure and Function

Chapter 9 in Textbook

Chapter 4 in Lab Book


Tissue l.jpg

Tissue

An aggregation of cells and cell products of similar structure and embryonic origin that perform a common function


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Histology

The study of tissues, especially their structure and arrangement


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Basic Tissue Types

  • Epithelial

  • Connective

  • Muscle

  • Nervous


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Organ

An aggregation of tissues organized into a functional unit


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System

Organs working together as functional units


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Epithelial Tissue

  • Sheet-like layer of cells

  • Cover surfaces or line cavities

  • Often has glandular cells for fluid secretion

  • Endothelium

    • Epithelium that lines heart, blood vessels and lymphatic vessels


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Epithelial Types

  • Simple Epithelium

    • Simple squamous – inside blood vessels

    • Simple cuboidal – lines ducts, ex. Kidney tubules, mucous glands

    • Simple columnar – lining of small intestine

    • Pseudostratified Columnar – trachea, bronchi





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Epithelial Types

  • Stratified Epithelium

    • Stratified squamous - skin

    • Transitional – urinary tract and bladder


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Connective Tissue

  • Tissue that connects

    • Loose connective tissue

      • adipose (fat)

    • Dense connective tissue

      • cartilage

      • Bone

    • Vascular tissue

      • Erythrocytes: Red Blood Cells – carry oxygen

      • Leucocytes: White Blood Cells – part of the immune system

      • Platelets - clotting





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Erythrocytes:

Red Blood Cells




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Muscle Tissue Types

  • Smooth Muscle (=Involuntary Muscle)

    • Ex. Small intestine

  • Skeletal Muscel (=Voluntary Muscle)

    • Ex. Large muscles of body

  • Cardiac Muscle


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Skeletal

Smooth

Cardiac


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Nervous Tissue

  • Includes Nerves, Spinal Cord, Brain

  • Cells are called neurons



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