Basic Science JSS1 Second Term

WEEK THREE

HUMAN REPRODUCTION I

Performance Objectives

Students should be able to:

• Meaning of menstruation

Content

REFERENCE
Precious Seed BASIC SCIENCE FOR JUNIOR SECONDARY SCHOOLS BOOK 1

Meaning of menstruation

Menstruation, also known as a period or monthly, is the regular discharge of blood and mucosal tissue from the inner lining of the uterus through the vagina. The first period usually begins between twelve and fifteen years of age, a point in time known as menarche. However, periods may occasionally start as young as eight years old and still be considered normal. The typical length of time between the first day of one period and the first day of the next is 21 to 45 days in young women, and 21 to 31 days in adults (an average of 28 days). Bleeding usually lasts around 2 to 7 days. Menstruation.... View More