diff --git a/bin/substances/Blood.xml b/bin/substances/Blood.xml
index 114a6dc..3319dad 100644
--- a/bin/substances/Blood.xml
+++ b/bin/substances/Blood.xml
@@ -28,4 +28,10 @@
     <Component Name="Creatinine">
         <Concentration value="0.001" unit="g/dL"/>
     </Component>
+	<Component Name="Oxygen">
+		<Concentration value="0.0314" unit="g/L"/>
+	</Component>
+	<Component Name="CarbonDioxide">
+		<Concentration value="0.715" unit="g/L"/>
+	</Component>
 </SubstanceCompound>
diff --git a/bin/substances/Saline.xml b/bin/substances/Saline.xml
index d85c95a..70b104c 100644
--- a/bin/substances/Saline.xml
+++ b/bin/substances/Saline.xml
@@ -7,4 +7,10 @@
     <Component Name="Chloride">
         <Concentration value="0.546" unit="g/dL"/>
     </Component>
+	<Component Name="Oxygen">
+		<Concentration value="0.0329" unit="g/L"/>
+	</Component>
+	<Component Name="CarbonDioxide">
+		<Concentration value="0.786" unit="g/L"/>
+	</Component>
 </SubstanceCompound>