Histology: Tissues & Organs

Histology: Overview of Tissues and Organs

Types of Tissues

• Nervous Tissue

  • Composed of giant multipolar neurons
  • Key Structures:
    • Cell body
    • Nucleus
    • Axon

• Muscular Tissue

  • Comprised of three main types:
  1. Smooth Muscle
     • Involuntary control
     • Lines most visceral organs
     • Characteristics:
     • Non-striated
     • Uninucleated fibers
  2. Cardiac Muscle
     • Involuntary control
     • Found in the heart
     • Characteristics:
     • Striated, tubular, branched
     • Intercalated discs present
  3. Skeletal Muscle
     • Voluntary control
     • Responsible for movement of bones
     • Characteristics:
     • Striated
     • Tubular
     • Multinucleated fibers

Epithelial Tissue

• Types of Epithelium:
  • Simple Squamous Epithelium
  • Simple Cuboidal Epithelium
  • Simple Columnar Epithelium
  • Stratified Squamous Epithelium
  • Pseudostratified Columnar Epithelium
  • Transitional Epithelium
  • Adaptable to stretching, found in the urinary bladder.
• Location Examples:
  • Nasal Passage: Pseudostratified Columnar
  • Kidney Tubules: Simple Cuboidal
  • Esophagus Lining: Stratified Squamous
  • Lungs: Simple Squamous
  • Intestines: Simple Columnar
  • Urinary System: Transitional

Connective Tissue

• Blood Smear:
  • Contains Red Blood Cells (RBC), White Blood Cells (WBC), and plasma
• Hyaline Cartilage:
  • Composed of chondrocytes; provides support with some pliability
• Bone Structure:
  • Comprised of Central Canal and Osteon (basic unit of bone structure)
• Adipose Tissue:
  • Contains fat droplets, serves as an energy reserve
• White Fibrous Tissue (Tendons):
  • Connects muscles to bones, facilitating movement

Key Skeletal Structures

• Importance of understanding various muscle types and their distinct characteristics for deeper insight into human anatomy and physiology.