According to Scitable, a human fetus briefly has a tail, but as Wikipedia explains, it doesn’t have gills during any stage of development. The pharyngeal arches, which are colloquially referred to as gill slits, have no relation to functional gills found in fish.Know More
During human fetus development, six pharyngeal arches develop, each with its own artery, nerve and skeletal tissue. However, the fifth arch only exists for a short period, Wikipedia further explains.
Scitable notes that the fetal tail disappears before the baby is born, similar to the fifth pharyngeal arch. However, if the Wnt-3a gene regulation is impaired, there is a very slight chance for a baby to have an actual tail after the birth, according to Scitable.Learn more about Human Anatomy
Anatomy is the study of form, while physiology is the study of function, according to Wikipedia. Anatomy is the scientific study of the structure of organisms including their systems, organs and tissues. It details the appearance and position of various parts, their material compositions and their locations and relationships with other parts. Physiology deals respectively with the functions of those anatomical parts and the chemical processes involved.Full Answer >
Babies generally start to kick in the womb around seven weeks. Most women can feel the baby moving by the second trimester.Full Answer >
According to WebMD, a fetus excretes waste through the umbilical cord while it is in the womb. On rare occasions, a fetus may excrete waste while still inside the uterus, as stated by the National Institute of Health. If this happens, the baby runs the risk of meconium aspiration syndrome.Full Answer >
Freckles are brought about as a result of exposure to the sun, meaning a baby may develop them as soon as he or she is exposed to the sun, according to the Women's and Children's Health Network. Freckles are small dark marks that appear on the skin and may vary in severity depending on the type of skin the baby has.Full Answer >