Our sweat contains acids, something to which bacterias are vulnerable. A common acid found in sweat is urea.
Answer:

Hope it helped,
Happy homework/ study/ exam!
Answer:
The circulatory system is made up of blood vessels that carry blood away from and towards the heart. Arteries carry blood away from the heart and veins carry blood back to the heart. The circulatory system carries oxygen, nutrients, and hormones to cells, and removes waste products, like carbon dioxide.
Blood comes into the right atrium from the body, moves into the right ventricle and is pushed into the pulmonary arteries in the lungs. After picking up oxygen, the blood travels back to the heart through the pulmonary veins into the left atrium, to the left ventricle and out to the body's tissues through the aorta.
A Neurologist deals with the nervous system
Answer: It is True!
Explanation:
A "rally" is what happens after the ball gets served and before it hits the floor. Bad Things™: The same player hitting the ball twice in a row. Touching the net. Holding the ball for a while (more than a quarter-second or so), known as a "lift," or a "carry."