Sonography.
It’s also another name for ultrasound
Answer:
i dont think you gave us the choices but epidemiology is the study of health distribution. it determines diseases as well as shapes decisions. essentially they deal with medicine having to do with big diseases and new diseases like cancer.
Red blood cells (erythrocytes)
The red blood cells are highly specialized, well adapted for their primary function of transporting oxygen from the lungs to all of the body tissues. Red cells are approximately 7.8 μm (1 μm = 0.000039 inch) in diameter and have the form of biconcave disks, a shape that provides a large surface-to-volume ratio. When fresh blood is examined with the microscope, red cells appear to be yellow-green disks with pale centres containing no visible internal structures. When blood is centrifuged to cause the cells to settle, the volume of packed red cells (hematocrit value) ranges between 42 and 54 percent of total volume in men and between 37 and 47 percent in women; values are somewhat lower in children. Normal red blood cells are fairly uniform in volume, so that the hematocrit value is determined largely by the number of red cells per unit of blood. The normal red cell count ranges between four million and six million per cubic millimetre.
Explanation:
Open the victim's airway by tilting the head and lifting the chin: –If possible, without moving the victim from his or her original position, place your hand on the victim's forehead and gently tilt the head back, keeping your thumb and index finger free to close the victim's nose if rescue breathing is required.
