Essentials of Anatomy and Physiology

The Lymphatic System and Immunity 329

Integumentary system

Mucous membranes and lysozyme

Langerhans cells Phagocytes Natural killer cells

Basophils and mast cells

Interferon Complement

Inflammation

T cell

Blocks viral

reproduction

Lyses cells,

attracts WBC's

Histamine and leukotrienes

Vasodilation •

Increased

capillary

permeability•

Tissue fluid

and WBCs •

Histamine and leukotrienes

Activate lymphocytes

Perforins

• Macrophage


• 
  


• Bacteria


• 
  

Neutrophils

• 
  


• 
  

  Antigen

  
  


• 
  


• 
  

Subcutaneous tissue

and WBC's

Defensins Langerhans cells

Stratum corneum

• •
  
  
  • Hydrochloric
    acid
  
  
  
  

Ciliated epithelium

Lacrimal gland

Salivary glands

• 
  


• •

A Barriers

B Cells

C Chemicals

Figure 14–6. Innate immunity. (A) Barriers. (B) Defensive cells. (C) Chemical defenses.

See text for description.

QUESTION:The three aspects of innate immunity are interconnected; describe two of

these connections.