Ovary—The ovaries produce the egg cells, called the ova or oocytes. The oocytes are then transported to the fallopian tube. Oviduct—The oviduct, or Fallopian tube in women, is a paired organ that is essential for fertility Uterus—Uterus, also called womb, an inverted pear-shaped muscular organ of the female reproductive system, located between the bladder and the rectum Testis—The testes are responsible for making testosterone, the primary male sex hormone, and for producing sperm. Semen—Semen, also called seminal fluid, fluid that is emitted from the male reproductive tract and that contains sperm cells, which are capable of fertilizing the female's eggs
The marble is release from the top of the ramp.Gravitational potential energy decreases as it roll down the ramp,at the same time the marble gains kinetic energy as well as a lost of energy in the form of heat due to friction.
Chenge in PE=change in KE
therefore energy remains the same on all parts of the ramp
