AbstractThe contents of lecithin in human lung, liver, spleen, kidney, heart muscle, skeletal muscle, placenta, endometrium, amniotic flud, and brain gray and white matter are 52.1–54.2%, 44.2–45.8%, 42.6–44.5%, 35.1–37.2%, 42.5–43.0%, 48.0–50.0%, 45.5–46.4%, 42.0–43.0%, 65.0–66.0%, 23.9–24.3% and 24.7–24.9% respectively in total phospholipids. The level of diphosphatidyl glycerol is much lower in placenta, lung and spleen, and almost absent in amniotic fluid and brain; the heart muscle has 8.6%. The content of phosphatidyl serine is high in endometrium and brain. The content of sphingomyelin is high in lung, spleen, kidney and brain as compared to liver, heart muscle, skeletal muscle and endometrium. It is suggested that the phospholipid composition of various human tissues is characteristic for that class.