Results 61 to 70 of about 655 (157)

Placenta: an old organ with new functions

Frontiers in Immunology
The transition from oviparity to viviparity and the establishment of feto-maternal communications introduced the placenta as the major anatomical site to provide nutrients, gases, and hormones to the developing fetus. The placenta has endocrine functions,
Sara Khorami-Sarvestani, Sara Khorami-Sarvestani, Negar Vanaki, Sorour Shojaeian, Kayhan Zarnani, Allan Stensballe, Allan Stensballe, Mahmood Jeddi-Tehrani, Amir-Hassan Zarnani, Amir-Hassan Zarnani   +9 more
doaj   +1 more source

A Viperine Snake which is Oviparous

, 1904
(Uploaded by Plazi from the Biodiversity Heritage Library) No abstract provided.
openaire   +2 more sources

Extended embryo retention and viviparity in the first amniotes. [PDF]

Nat Ecol Evol, 2023
Jiang B, He Y, Elsler A, Wang S, Keating JN, Song J, Kearns SL, Benton MJ.   +7 more
europepmc   +1 more source

Color vision evolution in egg-laying mammals: insights from visual photoreceptors and daily activities of Australian echidnas

Zoological Letters
Egg-laying mammals (monotremes) are considered “primitive” due to traits such as oviparity, cloaca, and incomplete homeothermy, all of which they share with reptiles.
Shiina Sakamoto, Yuka Matsushita, Akihiro Itoigawa, Takumi Ezawa, Takeshi Fujitani, Kenichiro Takakura, Yang Zhou, Guojie Zhang, Frank Grutzner, Shoji Kawamura, Takashi Hayakawa   +10 more
doaj   +1 more source

Egg retention and intrauterine embryonic development in Sceloporus aeneus (Reptilia: Phrynosomatidae): implications for the evolution of viviparity Retención de huevos y avance embrionario intrauterino en Sceloporus aeneus (Reptilia: Phrynosomatidae): implicaciones para la evolución de la viviparidad

Revista Mexicana de Biodiversidad, 2012
Egg retention (ER) and intrauterine embryonic development (IED) have been considered intermediate steps in the evolution from oviparity to viviparity. Sceloporus aeneus is an oviparous lizard that is closely related to the viviparous species (Sceloporus ...
Rodolfo García-Collazo, Maricela Villagrán-Santa Cruz, Eduardo Morales-Guillaumin, Rubi Nelsi Meza Lázaro, Fausto R. Méndez-de la Cruz   +4 more
doaj  

Understanding the evolution of viviparity using intraspecific variation in reproductive mode and transitional forms of pregnancy. [PDF]

Biol Rev Camb Philos Soc, 2022
Whittington CM, Van Dyke JU, Liang SQT, Edwards SV, Shine R, Thompson MB, Grueber CE.   +6 more
europepmc   +1 more source

Genomic Signatures Associated with Transitions to Viviparity in Cyprinodontiformes. [PDF]

Mol Biol Evol, 2023
Yusuf LH, Saldívar Lemus Y, Thorpe P, Macías Garcia C, Ritchie MG.   +4 more
europepmc   +1 more source

Mom and dad are not that different after all: Immune modulation as a prerequisite for the evolution of pregnancy. [PDF]

Mol Ecol, 2023
Monteiro N.
europepmc   +1 more source

Biología de la raya Psammobatis extenta (Garman, 1913) (Batoidea: Rajidae) Biology of the skate Psammobatis extenta (Garman, 1913) (Batoidea: Rajidae)

Revista Chilena de Historia Natural, 2002
Psammobatis extenta es un miembro común de la fauna de rayas de las costas de Sudamérica y su biología ha sido poco estudiada. Se investigaron aspectos de la biología de P.
JUAN M. BRACCINI, GUSTAVO E. CHIARAMONTE
doaj  

Different Dynamics of Reproductive Cell Development in Oviparous Clausilia bidentata and Ovoviviparous Ruthenica filograna Snails. [PDF]

Zool Stud, 2022
Szybiak K, Gabała E, Adamski Z.
europepmc   +1 more source