Answer:
the first defense the body uses against a virus is mucus
Answer:
A. Circulatory system
Explanation:
Circulatory system consist of heart,blood cells&blood vessels
<span>The answer should be B. The results of a previous experiment are presented as an introduction to a new experiment.
Material that used for </span>presentation of background research should have a credible information. A<span>mazing new drug is described in a television commercial mostly false and it is not backed up by scientific study. Rumor from </span><span>second-hand accounts definitely not credible. A newspaper is not a scientific study and could give false information.</span>
Epinephrine
Epinephrine is usually produced by the two kinds the adrenal
glands and certain neurons. It plays an
important role in the fight-or-flight response by increasing blood flow and
also to muscles, output of the heart, pupil dilation, and blood sugar.
Answer:
sustentacular cells
Explanation:
The hormone produced by the developing sustentacular cells, responsible for influencing the development of male reproductive structures.