Lecture 3: Epithelial Tissues

• What are the four basic types of tissue in the human body?

  Epithelial, connective, muscular, nervous

  
• What is the primary function of epithelial tissue?

  To cover and line surfaces
• What are the two types of epithelial tissue?

  Covering and lining epithelium, glandular epithelium
• What does lining epithelium cover?

  Skin and some internal organs

  
• Where is epithelial tissue located?

  It lines body cavities and surfaces

  
• What are the general features of epithelial tissue?

  • Composed of closely packed cells
  • Avascular (lacks blood vessels)
  • High regenerative capacity
  • Polarity (apical and basal surfaces)
• What are the two types of glands in epithelial tissue?

  Endocrine and exocrine glands

  
• What are the types of simple epithelium?

  1. Simple squamous epithelium
  2. Simple cuboidal epithelium
  3. Simple columnar epithelium (nonciliated/ciliated)
  4. Pseudostratified columnar epithelium (nonciliated/ciliated)
• What are the types of stratified epithelium?

  1. Stratified squamous epithelium (keratinized and non-keratinized)
  2. Stratified cuboidal epithelium
  3. Stratified columnar epithelium
  4. Transitional epithelium
• What is a goblet cell?

  A cell that secretes mucus
• What is the role of epithelial tissue in the body?

  • Protection of underlying structures
  • Absorption of substances
  • Secretion of hormones and enzymes
  • Sensation through nerve endings
• What is the significance of the arrangement of cells in epithelial tissue?

  It determines the tissue's function and protection
• What are the types and functions of muscular tissue?

  Types:

  1. Skeletal muscle
  2. Cardiac muscle
  3. Smooth muscle

  
  

  Functions:

  • Movement of bones
  • Pumping blood
  • Involuntary movements in organs
• What is the primary function of nervous tissue?

  To transmit electrical signals
• What is the role of tissue repair in homeostasis?

  Restores tissue integrity and function
• How does aging affect tissues?

  It leads to decreased regeneration and function
• What are some disorders that affect tissues?

  Inflammation, fibrosis, and tumors
• What are the general features of muscular tissue?

  • Composed of muscle fibers
  • Specialized for contraction
  • Types include skeletal, cardiac, and smooth

  
• What are the general features of nervous tissue?

  • Composed of neurons and glial cells
  • Specialized for signal transmission
  • Involved in reflexes and responses
• What are the general features of connective tissue?

  • Composed of various cell types
  • Contains an extracellular matrix
  • Provides support and protection