The difference between internal and external fertilization is that internal fertilization occurs inside the body, whereas external fertilization happens outside the body. Fertilization is the process by which a sperm cel... More » Science Biology

The difference between internal and external mail is the location of the intended recipient. Internal mail is communication via paper mail or email that is within a company. External mail is communication via mail or ema... More » Technology E-mail

While external customers place orders for a good or service and ultimately pay for it, internal customers do not. External customers are also external to the organization supplying the good or service, but most internal ... More » Business & Finance Business Resources
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After fertilization, the cells in the zygote divide rapidly to form a morula, which becomes the embryo after approximately five days. The fetus is present about eight weeks after the fertilization takes place. More » Science Biology

Examples of external fertilization can be seen in frogs, some marine invertebrates and many types of fish. External fertilization happens when sperm fertilize eggs outside of the body of the female animal. Often, in orde... More » Science Biology

Menstrual periods allow the female body to discharge excess uterine tissue and eggs when fertilization doesn't occur, according to KidsHealth. In preparation for ovulation, the hormone estrogen causes the uterine lining ... More » Health Women's Health Menstruation

Pickle juice cravings may stem from too much salt being excreted from the body, triggering an increase in salt intake. Pickle juice is also a common food craving during pregnancy. More » Science Biology