Mammals

Science

The muscle below the lungs that controls breathing

Diaphragm

The muscle below the lungs that controls breathing. Diaphragm. The diaphragm is a dome-shaped muscle that helps your lungs fill and empty with air.

The process of carrying young inside the body from fertilization to birth

Gestation

The process of carrying young inside the body from fertilization to birth. Gestation is the time when a baby develops inside the mother's womb.

A primate that walks upright, has a large brain, opposable thumbs, and no tail

Hominid

A primate that walks upright, has a large brain, opposable thumbs, and no tail. Hominid. A hominid is a type of primate that includes humans and their fossil ancestors.

Primates that can walk on two legs, like orangutans, gorillas, chimpanzees, and humans

Hominoid

Primates that can walk on two legs, like orangutans, gorillas, chimpanzees, and humans. Hominoids are a group of primates that include all apes and humans, characterized by their lack of tails and ability to walk upright.

Milk-producing gland in female mammals

Mammary gland

Milk-producing gland in female mammals. Mammary gland. The mammary gland is an organ in female mammals that produces milk to feed their young.

A mammal that carries its young in a pouch

Marsupial

A mammal that carries its young in a pouch. Marsupial. Marsupials are a group of mammals, like kangaroos and koalas, whose babies develop in a special pouch on the mother's body.

A mammal that reproduces by laying eggs

Monotreme

A mammal that reproduces by laying eggs. Monotreme. A monotreme is a type of mammal that lays eggs instead of giving birth to live young, like the platypus and echidna.

An organ that connects a fetus to its mother, providing it with nutrients and removing waste

Placenta

An organ that connects a fetus to its mother, providing it with nutrients and removing waste. Placenta. The placenta is a vital organ in pregnancy that nourishes the baby and helps remove waste products.

Extinct mammal-like reptiles that evolved into mammals

Therapsid

Extinct mammal-like reptiles that evolved into mammals. Therapsid. Therapsids are ancient reptiles that served as ancestors to modern mammals.