<span>Rivers can be polluted by nitrates because the fertilizers in the field that contain nitrates are washed into the river because of rain and flooding. Other source of nitrate pollution in the rivers is the mixing of sewage which contains human and animal wastes.</span>
For women they are mostly asymptomatic. Even when they have symptoms they will be mild compared to men but still serious for both sexs since it can cause infertility and damage to genitals. It can be tricky to categorize the stages of infection since most people who have it don’t display symptoms hence why it spreads so easily. It’s different for everyone. But If it has to be categorized it’s /primary would be pain and burning while urinating. Secondary would be yellow,white,bloody discharge from genetials,Pain and swelling of the testicals for men,. Tertiary would be infertility and sensitivity around genitalia “permanent” damage.
Answer: Endocrine system
Explanation: The integumentary system is that is made up of the skin, hair, nails and the Endocrine glands. The following functions of the integumentary system are:
a. It protects skin from any form of damage which could be in form dehydration.
b. It protects the skin by secreting an hormone called melanin which protects the skin from ultra violet radiation.
c. The integumentary system helps in regulating and maintaining the body temperature
d. The skin which is part of the integumentary system secretes Vitamin D which is an essential in building of strong and healthy bones.
It is an example of migration. Hope this helps!
