Blood composition

Plasma

Ions

Ion	concentration	simple to achieve?
Na+	136 - 145 mM	simple
K+	3.5 - 5.0 mM	simple
Ca2+	2.1 - 2.6 mM	simple
Mg2+	0.6 - 1.0 mM	simple
H+	0.04 mM (pH 7.40)	simple
HCO3-	24 - 28 mM	simple
Cl-	100 - 110 mM	simple
HPO42-	1.1 - 1.5 mM	simple
SO42-	0.3 - 0.6 mM	simple

Metabolites

Metabolite	concentration	simple to achieve?
glucose	3.6 - 6.1 mM	simple
lactate	0.4 - 1.8 mM	simple
pyruvate	0.07 - 0.11 mM	simple
urea	3.5 - 9.0 mM	simple
uric acid	0.18 - 0.54 mM	simple
creatinine	0.06 - 0.13 mM	simple
amino acids	2.3 - 4.0 mM	simple
ammonia	0.02 - 0.06 mM	simple (is it just waste? so as minimal as possible is desirable?)
lipids	5.5 - 6.0 g/L (~3 mM)	simple
triacylglycerol	1.0 - 1.3 g/L	simple
cholesterol	1.7 - 2.1 g/L	simple

Proteins

albumine (45g/L)
transthyretin

alpha1-globulines

antitrypsin
antichymotrypsin
lipoprotein (HDL)
prothrombin
transcortin
acidic glycoprotein
thyroxine-binding globulin

alpha2-globulines

ceruloplasmin
antithrombin III
haptoglobin
cholinesterase
plasminogen
macroglobulin
retinol-binding protein
vitamin D binding protein

beta-globulines

lipoprotein (LDL)
transferrin
fibrinogen
sex hormone binding globulin
transcobalamin
C-reactive protein

gamma-globulines

IgG
IgA
IgM
IgD
IgE

Lipoproteins

chylomicrones (<0.95 g/cm3)
VLDL (very low density lipids, 0.95 - 1.006 g/cm3)
IDL (intermediate density lipids, 1.006 - 1.019 g/cm3)
LDL (low density lipids, 1.019 - 1.063 g/cm3)
HDL (high density lipids, 1.063 - 1.210 g/cm3)

Cytokines

interleukins

Good table of interleukins in humans (from IL-1 to IL-36) https://en.wikipedia.org/wiki/Interleukin#In_humans

Cells and their fragments

red blood cells

5*10^12 /L

Platelets

250e9 /L