Embryo implantation in humans. After fertilization the human embryo begins a 4 day long journey down the fallopian tube and into the uterus. When the embryo reaches the blastocyst stage it develops two distinct populations of cells. The outer cell mass,called the trophectoderm, and the inner cell mass.
Cat eye glasses. Named after their resemblance to the shape of a cat's eye, cat eye glasses are probably the most popular style of vintage eyeglasses. Though cat eye glasses were around since the 1950's, they reached their peak popularity when Audrey Hepburn wore a pair in the 1961 film Breakfast at Tiffany's.
This condition is seen in many cats, especially orange tabbies or calico cats. Most often the spots appear in middle-aged to older cats. Owners usually notice the small black spots on the lips or nose first; only to worry as more dots appear and some grow a bit larger.The most common answer for black spots appearing on your cats lips, nose, or eye margins is that it is a condition called lentigo simplex, and it is not a form of cancer.In fact, it is completely harmless, just like human freckles.he most common answer for black spots appearing on your cats lips, nose, or eye margins is that it is a condition called lentigo simplex, and it is not a form of cancer.