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Title: The Reproductive System
Description: Full notes about sexual development, and how each gender changes during puberty. It talks about the male and female reproductive system, and their functions. It also talks about the menstrual cycle, and all its phases. Finally, it talks about some STDs.
Description: Full notes about sexual development, and how each gender changes during puberty. It talks about the male and female reproductive system, and their functions. It also talks about the menstrual cycle, and all its phases. Finally, it talks about some STDs.
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3 : The Reproductive System
Sexual Development
- Estrogens & testosterone are steroid hormones that are produced
in gonads
...
- In females, sex hormones produce breast development, and
widening of hips
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- Puberty :period of rapid growth and sexual maturation when
reproductive system becomes fully functional
...
The Male Reproductive System
- LH produces increased amounts of testosterone, which causes
physical changes associated with puberty and FSH it stimulates
development of sperm
...
- Before birth, the primary reproductive gland, testes, descend into
external sac called scrotum
...
- After being produced in seminiferous tubules, sperm moves into
epididymis, where they mature and are stored
...
- Eventually, vas deferensmerges with urethra, the tube that lead
to outside of the body through the penis
...
- Combination of sperm & seminal fluid is semen
...
- Sperm are ejected from penis by contraction of smooth muscles
...
- If sperm are released in tract of female, the changes of sperm
fertilizing an egg is very good
...
- At tip of head, there are enzyme that are vital to fertilization
...
- Main function of female reproductive system is to produce egg
cells, or ova
...
Female Reproductive Structures
- At puberty, ovaries have 400,000 primary follicles, which helps an
egg mature for release
...
Menstrual Cycle
- One ovary is produced and released one ovum every 28 days or
so
...
- Menstrual cycle is regulated by hormones produced by
hypothalamus, pituitary, and ovaries
...
The uterus prepares to receive fertilized egg
...
If its not, it is discharged,
along with the lining of uterus
...
- As follicle develops, cells surrounding the egg enlarge and begin to
produce estrogen, which causes less releasing of FSH and LH
...
Development of egg takes 12 days
...
Hypothalamus
secretes burst of LH and FSH
...
The result
is ovulation
...
Luteal Phase
- Luteal phase begins after ovulation
...
- Follicle becomes yellow, and is known as corpus luteum
...
- Rise in these hormones causes FSH & LH to inhibit
...
Estrogen falls, release of FSH & LH increases
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- This tissues are discharged through vaginas
...
STDs
- Diseases that spread by sexual contact, or sexually transmitted
diseases are a serious health problem
...
- Chlamydia damages the reproductive system tract, and can cause
infertility
...
- Viruses can cause STD
...
- Some viral STDs, such as AIDS, can be fatal
...
- STDs can be avoided
...
- The safest course is to abstain from sexual contact before
marriage, and for partners to remain faithful
...
Title: The Reproductive System
Description: Full notes about sexual development, and how each gender changes during puberty. It talks about the male and female reproductive system, and their functions. It also talks about the menstrual cycle, and all its phases. Finally, it talks about some STDs.
Description: Full notes about sexual development, and how each gender changes during puberty. It talks about the male and female reproductive system, and their functions. It also talks about the menstrual cycle, and all its phases. Finally, it talks about some STDs.