Hypothyroidism is treated by giving the patient sufficient thyroxine (thyroid hormone), the most commonly prescribed in Canada being Synthroid and Eltroxin. The average daily dose is 0.125 milligrams (125 micrograms); it is rare to require more than 0.2 milligrams (mg).
The blood consists of a suspension of special cells in a liquid called plasma. In an adult man, the blood is about 1/12th of the body weight and this corresponds to 5-6 litres. Blood consists of 55 % plasma, and 45 % by cells called formed elements. The blood performs a lot of important functions. By means of the hemoglobin contained in the erythrocytes, it carries oxygen to the tissues and collects the carbon dioxide (CO2).
Trace the flow of blood leaving the fetal heart (1), traveling to the placenta, and returning to the heart (6): A Blood leaves heart via aortic semilunar valve or ductus arteriosus. B Blood leaves the developing liver, passes through the inferior vena cava to the right atrium. C Blood passes through the ductus venosus. D Oxygenated blood enters the umbilical vein.