What structure prevents the blackflow of blood?

What is the red circular rash strawberry like appearance on your lower leg on the shin area that does not itch and wont go away? You and your husband have been trying a year to get pregnant and haven't conceived yet you have counted up the ovulation days and everything so what do we need to do? How does the long axon help in a nerve cell? Does low thyroid affect kidneys? How long after having a d and c does it take for a woman to be able to get pregnant? What can it be if a thick substance attaches to your armpit hairs and it stinks? Is flexeril an opiate? What are the three major types of bodily disorders? Why might you eat foods and drinks beverage that contain vitamin C during stressful times? Where is jock itch likely to appear? Is gas heartburn diarrhea and mild cramping signs of? What Disease starting with j? What favors the movement of Oxygen from alveolar into the blood? What does checking for clarity mean? What is a Decubitus ulcer How does it occur? What happens after a thrombosis? What does a gender psychologist do? What is the most common bacterial STD? My goldfish has red blood in its tail fins? What is chicken digest?