The phase of the menstrual cycle in humans that lasts for 7-8 days, is:
Correct answer: D. Menstruation
- A. Follicular phase
- B. Teal phase
- C. Ovulatory phase
- D. Menstruation
Explanation
The phase of the menstrual cycle that typically lasts for 7-8 days is known as the "menstrual phase" or "menstruation." This is the time when the uterine lining, which had built up in preparation for a potential pregnancy during the previous menstrual cycle, is shed if fertilization and implantation did not occur. Menstruation involves the discharge of blood, along with some tissue and fluid, from the uterus through the vagina.
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About Reproduction
Human reproduction covers the male and female reproductive organs, gamete formation, fertilization, implantation and hormonal regulation. The menstrual cycle includes ovarian and uterine changes controlled by pituitary and ovarian hormones, while sexually transmitted diseases are studied through their causes, transmission, symptoms, prevention and effects on fertility.
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