In mammalian brain anatomy, the prefrontal cortex (PFC) is the cerebral cortex which covers the front part of the frontal lobe.The PFC contains Brodmann areas 9, 10, 11, 12, 46, and 47. third definition of the prefrontal cortex is the area of frontal cortex whose electrical stimulation does not lead to observable movements. For example, in 1890 David Ferrier used the term in this sense.
The blubber helps to keep them warm since they live in a very cold environment.   When harp seals are born, they have a white â¦ fur coat. The fur coat camouflages into the snow to protect them from their enemies on land.
In general, if the semen is still wet it may well have live sperm. As long as freezing conditions remain at a constant temperature, sperm can survive the freezing process indefinitely. Those sperm that die do so within the first 48 hours of freezing, and the attrition rate thereafter is very slight.Frozen semen can be stored for as long as 50 years without additional sperm deterioration beyond that caused by the original freezing process. â¥happily marriedâ¥ Â· 8 years ago.hose sperm that die do so within the first 48 hours of freezing, and the attrition rate thereafter is very slight. Frozen semen can be stored for as long as 50 years without additional sperm deterioration beyond that caused by the original freezing process. â¥happily marriedâ¥ Â· 8 years ago.