-If zygote is not formed, the inner wall of uterus breaks which causes bleeding through vagina. This process is called MENSTRUATION. It occurs at a regular interval of 28 days. -The Embroyo gets nutrition from the mother's blood with the help of a special tissue called PLACENTA. -It provides a large surface area for glucose and oxygen to pass from the mother to the embryo. Similarly the wastes from developing embryo are removed to mother's blood through placenta. -The is born as a result of rhythmic contractions of the muscles in the uterus after nine months (36 weeks) of development inside mother's womb, called Gestation Period. -The sexual cycle in a woman continues upto the age of 45 to 50 years. After that the ovary do not release egg. This stage is called Menopause. It a also marks the end of menstruation in the woman. REPRODUCTIVE HEALTH Reproductive Health means a total well-being in all aspects of reproductive, ie., physical emotional, social and behavioral. Contraception : It is the avoidance of pregnancy. Chapter- 16 {Management of natural resources} Management of natural resources is needed for conservation of natural resources. There are national and international laws and Acts to protect the environment. Ganga Action Plan : Multi Crore Project came in 1985 to improve the quality of Ganga Accordingly a survey was conducted and a data was collected of coliform ( a of bacteria found in human intestine) between 1993-1994 National Award for wildlife conservation In the memory Amrita Devi – Bishnoi who lost her life in the protection of Khejri trees in Rajasthan alongwith 363 other people.
-If zygote is not formed, the inner wall of uterus breaks which causes bleeding through vagina. This process is called MENSTRUATION. It occurs at a regular interval of 28 days. -The Embroyo gets nutrition from the mother's blood with the help of a special tissue called PLACENTA. -It provides a large surface area for glucose and oxygen to pass from the mother to the embryo. Similarly the wastes from developing embryo are removed to mother's blood through placenta. -The is born as a result of rhythmic contractions of the muscles in the uterus after nine months (36 weeks) of development inside mother's womb, called Gestation Period. -The sexual cycle in a woman continues upto the age of 45 to 50 years. After that the ovary do not release egg. This stage is called Menopause. It a also marks the end of menstruation in the woman. REPRODUCTIVE HEALTH Reproductive Health means a total well-being in all aspects of reproductive, ie., physical emotional, social and behavioral. Contraception : It is the avoidance of pregnancy. Chapter- 16 {Management of natural resources} Management of natural resources is needed for conservation of natural resources. There are national and international laws and Acts to protect the environment. Ganga Action Plan : Multi Crore Project came in 1985 to improve the quality of Ganga Accordingly a survey was conducted and a data was collected of coliform ( a of bacteria found in human intestine) between 1993-1994 National Award for wildlife conservation – In the memory Amrita Devi Bishnoi who lost her life in the protection of Khejri trees in Rajasthan alongwith 363 other people.
Class%20X%20Science%20Notes.docx