Heat and redness, or occur when the small blood vessels in an inflamed area dilate (open up), bringing more blood much closer to the surface of the skin.

Swelling

Explanation:

Inflammation is a response which is triggered by the damaged tissue to the living tissue. This is a type of defense mechanism by the body that is generated in response to the infection or injury.

There are some signs and symptoms of inflammation. These are heat, redness or swelling, which occurs when the small blood vessel in the infected area dilates. Vasodilation occurs that causes swelling and redness in the area. Increased blood supply heats up the area.

the corpus luteum secretes estrogens and progesterone. the latter hormone causes changes in the uterus that make it more suitable for implantation of the fertilized ovum and the nourishment of the embryo. if the egg is not fertilized, the corpus luteum becomes inactive after 10–14 days, and menstruation occurs.

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