Answer:
antibodies
Explanation:
The third line of defense is specific resistance. This system relies on antigens, which are specific substances found in foreign microbes. Most antigens are proteins that serve as the stimulus to produce an immune response. The term "antigen" comes from ANTI-body GENerating substances.
The answer is C.
Because if it is not Medical Science then C is the answer you are looking for
Each cycle<span> can be divided into </span>three phases<span> based on events in the ovary (ovarian </span>cycle<span>) or in the uterus (uterine </span>cycle<span>). The ovarian </span>cycle<span>consists of the follicular </span>phase<span>, ovulation, and luteal </span>phase<span> whereas the uterine </span>cycle<span> is divided into </span>menstruation<span>, proliferative </span>phase<span>, and secretory </span>phase<span>.</span>
