The three different ways mammals give birth - Kate Slabosky
TED-Ed・3 minutes read
Mammals have common features like warm blood, body hair, and lungs, with placental mammals nourishing embryos through a placenta until birth, while marsupials like kangaroos carry tiny babies in a pouch to continue development.
Insights
- Placental mammals, exemplified by humans and blue whales, sustain their embryos through a placenta attached to the uterus until birth, after which the newborn becomes self-sufficient.
- Marsupials, typified by kangaroos, nurture underdeveloped young in a pouch post-birth, demonstrating distinctive reproductive strategies among mammals.
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Recent questions
What are the defining characteristics of mammals?
Mammals are vertebrates with warm blood, body hair, lungs for breathing, and nourish their young with milk.
How do placental mammals differ from marsupials in reproduction?
Placental mammals have a placenta that provides nutrients to the developing embryo until birth, while marsupials give birth to tiny babies that continue developing in the mother's pouch.
Which mammals have a placenta for embryo development?
Placental mammals like humans and blue whales have a placenta for embryo development.
What is unique about the birthing process of marsupials?
Marsupials like kangaroos give birth to tiny babies that continue developing in the mother's pouch, where they suckle milk until they are ready to feed themselves.
How do mammals nourish their young?
Mammals nourish their young with milk until they are ready to feed themselves, showcasing a common trait among over 5,000 species.
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Summary
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Mammals: Common Features and Unique Birthings
- Mammals, including over 5,000 species, share common features such as being vertebrates, having warm blood, body hair, lungs for breathing, and nourishing their young with milk.
- Placental mammals, like humans and blue whales, have a placenta that attaches to the uterus wall, providing nutrients and oxygen to the developing embryo until birth, where the newborn takes over its own systems.
- Marsupials, like kangaroos, give birth to tiny babies that continue developing in the mother's pouch, where they suckle milk until they are ready to feed themselves, showcasing unique birthing methods within the mammal kingdom.
