They are placental mammals.
Not only humans have umbilical cord, all the mammals of the Eutheria infraclass have it, this are the placental mammals and are all the animals that give birth to a live animal but not including the marsupials such as the kangaroo, for example the human, the dog, the cow all have umbilical cord
A fetal pig is a fetus- not yet born, Unborn mammals receive their oxygen and nutrition through their umbilical cords that connect them to the placenta, which connects them to their mother,
Yes, they do. When they are born, the momma cat chews through the umbilical cord, and the sack that each kitten is in.
No they hatch from eggs
no
with sissors
Umbilical cords have two arteries and a vein inside them. These are surrounded by a material called Wharton's Jelly and a protective membrane known as the amnion.
Embryonic stem cells come from umbilical cords in small quantities, which are harvested by collecting cord blood.
No
Two umbilical cords, two placentas, two bags of water, two of everything! That is unless they are conjoined twins.
They get nutrients through their umbilical cords.
No, only mammals which develop inside the mother's womb depend on a placenta for their growth, and therefore have an umbilical cord. (There is no umbilical cord involved in the development of those few mammals who lay eggs or whose babies develop in the mother's pouch.) Since birds are hatched from eggs, no placenta-umbilical cord mechanism is involved. Most of a fetal bird's development takes place outside its mother's body, in the egg.