Eutherian Mammal is a term used to describe placental mammals, which are mammals that give birth to live young. The spelling of Eutherian Mammal can be broken down into its phonetic transcription: [juːˈθɪərɪən ˈmæməl]. The first syllable "eu-" is pronounced like "you," the "th" sound is a voiced dental fricative, the "r" is pronounced, and the stress is on the second syllable. The second word "mammal" is pronounced with primary stress on the first syllable and a secondary stress on the second syllable.
Eutherian Mammal is a term used in biology to refer to a vast group of animals that belong to the class Mammalia. They are a subdivision of mammals, characterized by specific anatomical and physiological characteristics distinguishing them from other groups of mammals such as monotremes and marsupials. Eutherian mammals are the most diverse and dominant group of mammals on Earth, with over 5,400 known species, including humans.
The defining feature of eutherian mammals is that they give birth to live young ones, as opposed to laying eggs or giving birth to underdeveloped young that continue to develop in pouches. They possess a placenta, a nurturing organ that provides oxygen and nutrients to the developing fetus, allowing it to grow and develop internally. This placenta establishes a direct connection between the mother and the fetus, enabling the exchange of gases, nutrients, and waste products.
Eutherian mammals have a wide variety of habitats, ranging from terrestrial to aquatic environments. They display an incredible range of adaptations, demonstrating remarkable diversity in terms of size, shape, locomotion, feeding habits, and reproductive strategies. The group includes various orders, such as rodents, primates, carnivores, ungulates, and many more.
Eutherian mammals have played a significant role in the evolution of ecosystems and have become a critical part of various ecological niches worldwide. They have developed a range of adaptations that have allowed them to exploit diverse food sources and occupy various niches in ecosystems. Eutherian mammals have also played a vital role in the cultural, economic, and scientific advancement of humans, serving as sources of companionship, food, inspiration, and biomedical research subjects.
The word "Eutherian" comes from the Greek prefix "eu-", meaning "good" or "true", and the Greek word "thērion", meaning "beast" or "animal". "Mammal" originates from the Latin word "mamma", which means "breast" or "udder". Combining these two words, "Eutherian Mammal" refers to a specific group of mammals that give birth to live young and nourish them with milk produced by mammary glands.