Britich lesson for year 8 biology f

1. Sexually transmitted diseases are known by the
initials STDs but they also may be called sexually
transmitted infections (STIs).They are transmitted
by sexual intercourse. Some of the diseases are-
1. Chlamydia
2. Gonorrhea
3. Syphills

2. Pelvic Inflammatory Disease (PID) is a disease that
can be caused by a wide range of infections and
affects the ovaries, fallopian tubes and the uterus.
When the fallopian tubes are infected they become
inflamed and are the main cause of infertility. The
main causes of PID are sexually transmitted
diseases.

3. When males are infected with a disease, are
particularly sexually transmitted diseases, the
activity of the sperm is reduced so that they are
less able to swim to find an egg. When a person
recovers from the disease the sperm regain
their activity but, if a male has had a sexually
transmitted disease a few times, the tubes
carrying the sperm may be scarred due to the
infection and block of the path of sperm.

4. Can also affect both male and female
reproductive systems, blocking the path of
sperm in males and causing infections in the
oviducts and uterus in female. Tuberculosis
during pregnancy may also cause the death of
the fetus.

5. If the mother has malaria it can kill
the fetus as it grows or slow down
its development so a smaller baby
than normal is born.

6. It causes damage to the fetus
which results in the baby being
born with disability. It can cause
damage to the nervous system of
the foetus and produce deafness
and blindness.The heart can also
be damaged

7. A female with AIDS may pass on the
virus during pregnancy or at birth
and this will damage the immune
system of the baby
Immune System:
It’s the system that
defend us from
diseases