Final answer:
Marsupials, such as kangaroos, have a more open cervix compared to other species in mammals.
Step-by-step explanation:
Humans are known to have a rather open cervix in comparison to several other animal species. The lowest portion of the uterus that joins the vagina is called the cervix. In humans, the cervix changes, becoming softer and more open to allow the passage of menstrual blood or the delivery of a baby, particularly during specific times of the menstrual cycle and during childbirth.
An essential component of the human reproductive process is this openness. However, each person's level of cervical openness varies, and it is impacted by both reproductive events and hormone changes. It's crucial to remember that cervical structure and function can vary greatly throughout species of mammals.