For hot or cold you can make sure to replenish electrolytes. Make sure you are dressing appropriately in cold weather (dressing warm enough but not too warm because of overheating). If you are exercising in hot weather make sure to be hydrated when you start, drink water throughout, and pay attention to your body and if you are overheating make sure you stop and take a rest or slow down.
Yes, the lack of vitamins can affect your body as well as your health in a negative/bad way.<span />

1) ovulation, fertilization, and implantation
2)development of an embryo and then a fetus
3) contractions of the uterus and dilation of the cervix
4)expulsion of the placenta and cutting the umbilical cord
5) birth of the baby.

Answer:
The immune system is made up of special organs, cells and chemicals that fight infection (microbes). The main parts of the immune system are: white blood cells, antibodies, the complement system, the lymphatic system, the spleen, the thymus, and the bone marrow.
Explanation:
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