Oviparous animals are animals that lay eggs, with little or no other embryonic development within the mother. In most Birds and Reptiles an egg ( Latin ovum) is the Zygote, resulting from Fertilization of the Ovum. An embryo (from Greek:, plural, lit "that which grows" from en- "in" + bryein "to swell be full" is a multicellular This is the reproductive method of most fish, amphibians and reptiles, all birds, the monotremes, and most insects and arachnids. Reproduction is the Biological process by which new individual Organisms are produced Fish are aquatic Vertebrate animals that are typically ectothermic (previously Cold-blooded) covered with scales, and equipped with two Prehistoric amphibian Amphibians (class Amphibia such as Frogs Toads Salamanders Newts Gymnophiona, Sirens and Reptiles, or members of the class Reptilia are air-breathing Cold-blooded Vertebrates that have skin covered in scales as opposed to hair or feathers Birds ( class Aves) are bipedal endothermic ( Warm-blooded) Vertebrate animals that lay eggs. Monotremes (from the Greek monos 'single' + trema 'hole' referring to the Cloaca) are Mammals that lay eggs ( Prototheria) instead Insects ( Class Insecta) are a major group of Arthropods and the most diverse group of Animals on the Earth with over a million described Arachnids are a class ( Arachnida) of joint-legged Invertebrate Animals in the subphylum Chelicerata.
Land-dwelling animals that lay eggs, often protected by a shell, such as reptiles and insects, do so after having completed the process of internal fertilization. For soil improvement see Fertilization (soil. Water-dwelling animals, such as fish and amphibians, lay their eggs before fertilization, and the male lays its sperm on top of the newly laid eggs in a process called external fertilization.
Almost all non-oviparous fish, amphibians and reptiles are ovoviviparous, i. Ovoviviparous Animals develop within eggs that remain within the mother's body up until they hatch or are about to hatch e. the eggs are hatched inside the mother's body (or, in case of the sea horse inside the father's). Seahorses are a Genus ( Hippocampus ') of fish belonging to the family Syngnathidae, which also includes Pipefish and Leafy The true opposite of oviparity is placental viviparity, employed by almost all mammals (except for monotremes). A viviparous Animal is an animal employing vivipary: the embryo develops inside the body of the mother as opposed to outside in an egg ( Ovipary Monotremes (from the Greek monos 'single' + trema 'hole' referring to the Cloaca) are Mammals that lay eggs ( Prototheria) instead
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A viviparous Animal is an animal employing vivipary: the embryo develops inside the body of the mother as opposed to outside in an egg ( Ovipary Ovoviviparous Animals develop within eggs that remain within the mother's body up until they hatch or are about to hatch Medical Subject Headings ( MeSH) is a huge Controlled vocabulary (or metadata system for the purpose of indexing journal articles and booksDapyx Software network: MP3 Explorer | Ebook Manager | Zenithic