Capillary walls are only one cell thick, so oxygen can pass out of the blood, and waste material can pass into the blood.

A sinus tract that connects two epithelial surfaces is called a(n):

A. iliosotomy. B. partial-thickness wound. C. tunnel. D. fistula.

Temporary employees and volunteers may be excluded from state Workers' Compensation programs.

Answer the following statement true (T) or false (F)