The most common type of leg ulcers are those caused by:

The most common type of leg ulcers are those caused by:
 
  a. arterial disease.
  b. venous disease.
  c. lymphatic disease.
  d. mixed arterialvenous disease.

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A benign disorder consisting of irregular patches of skin totally lacking in pigment is:
 
  a. ichthyosis.
  b. pityriasis rosea.
  c. psoriasis.
  d. vitiligo.

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A pustule is a:
 
  a. vesicle or bulla containing pus.
  b. mass of exfoliated epidermis.
  c. circumscribed, elevated superficial area filled withclear fluid.
 d. plug of secretion contained in a follicle.

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Wounds affecting the epidermis and the dermis are called:
 
  a. superficial.
  b. partial thickness.
  c. full thickness.
  d. none of the above.