Chapter 2.CR, Problem 18CR

Human blood is typed ${\text{Rh}}^{+}$ (positive blood) or ${\text{Rh}}^{-}$ (negative blood). This Rh factor is called an antigen. There are two other antigens known as A and B types. Blood lacking both A and B types is called type O. In Problem 60 of Section 2.3, you were asked to sketch a Venn diagram showing the three types of antigens A, B, and Rh. One possible diagram is shown in Figure 2.18.

Recipient Blood Types	Donor Blood Types
${\text{A}}^{+}$	${\text{A}}^{+},{\text{ A}}^{-},{\text{ O}}^{+},{\text{ O}}^{-}$
${\text{B}}^{+}$	${\text{B}}^{+},{\text{ B}}^{-},{\text{ O}}^{+},{\text{ O}}^{-}$
${\text{AB}}^{+}$	${\text{A}}^{+},{\text{ A}}^{-},{\text{ B}}^{+},{\text{ B}}^{-}$
	${\text{AB}}^{+},{\text{ AB}}^{-},{\text{ O}}^{+},{\text{ O}}^{-}$
${\text{O}}^{+}$	${\text{O}}^{+},{\text{ O}}^{-}$
${\text{A}}^{-}$	${\text{A}}^{-},{\text{ O}}^{-}$
${\text{B}}^{-}$	${\text{B}}^{-},{\text{ O}}^{-}$
${\text{AB}}^{-}$	${\text{A}}^{-},{\text{ B}}^{-},{\text{ AB}}^{-},{\text{ O}}^{-}$
${\text{O}}^{-}$	${\text{O}}^{-}$

FIGURE 2.18 The eight blood types and compatibility table

List the eight possible blood types.

60. Human blood is typed ${\text{Rh}}^{+}$ (positive blood) or ${\text{Rh}}^{-}$ (negative blood). This Rh factor is called an antigen. There are two other antigens known as A and B types. Blood lacking both A and B types is called type O. Sketch a Venn diagram showing the three types of antigens A, B, and Rh, and label each of the eight regions. For Example, ${\text{O}}^{+}$ is inside the Rh set (anything in Rh is positive) but outside both A and B. On the other hand, ${\text{O}}^{-}$ is that region outside all three circles.