Menstruation, or period, is normal vaginal bleeding that occurs as part of a woman's monthly cycle. Every month, your body prepares for pregnancy. If no pregnancy occurs, the uterus, or womb, sheds its lining. The menstrual blood is partly blood and partly tissue from inside the uterus.
It may indicate an injury to the cervical spine.
It would be a first degree burn.
En 1953, los científicos Francis Crick, de Gran Bretaña, y James Watson, de Estados Unidos, publicaron la famosa estructura de la doble hélice del ADN, en un artículo de apenas una página, en la revista Nature.