118 results found

Search Results for: mammal

Prototherian mammal

Definition noun, plural: prototherian mammals Any from the group of mammals in which the young develop within the egg that... Read More

Mammalian Ancestors

Humans are mammals, the most successful taxonomic class of organisms to colonize the Earth. The word mammal derives from the... Read More

Placental mammal

Definition noun, plural: placental mammals Another term for eutherian mammal, i.e. a mammal possessing a chorioallantoic... Read More

Eutherian mammal

Definition noun, plural: eutherian mammals Any from the group of mammals possessing chorioallantoic placenta (as opposed... Read More

Metatherian mammal

Definition noun, plural: metatherian mammals Any from the group of mammals possessing choriovitelline type of placenta (as... Read More

Mammalia

Definition noun, plural: mammals A taxonomic class that includes all mammals Supplement Mammalia is a taxonomic class of... Read More

Mammalogy

Definition noun A branch of biology that is concerned with the study of mammals Supplement In biology, mammalogy is a branch... Read More

Mammal

Definition noun, plural: mammals Any of the endothermic vertebrates belonging to class Mammalia, which are identifiable by... Read More

Monotreme

Definition noun (zoology) Any of the egg-laying mammals belonging to the taxonomic group, Monotremata Supplement The class... Read More

Early Mammals on Earth

By the time the dinosaurs were extinct 65 million years ago, the world's landmass had split up into more or less the... Read More

Baculum

Definition noun, plural: baculums or bacula A bone located in the glans penis or glans clitoridis of certain mammals,... Read More

Rhinarium

Definition noun, plural: rhinaria The hairless skin area surrounding the nostrils in certain mammals Supplement Rhinarium is... Read More

Placenta

Definition noun, plural: placentae or placentas (1) (zoology) The vascular organ formed during gestation of female mammals... Read More

Monotremata

Definition noun (taxonomy) A subdivision of the class Mammalia comprised of mammals laying eggs rather than giving birth to... Read More

Mole

Definition noun, plural: moles (chemistry) (1) The SI unit of amount of substance of a chemical system that contains as many... Read More

Placentalia

Definition noun (taxonomy) A subdivision of the class Mammalia characterized primarily by their fetus being carried in the... Read More

Melanophore

Definition noun, plural: melanophores A type of pigment cell that, in particular, produce and store... Read More

Y-linked gene

Definition noun, plural: Y-linked genes A gene located on the Y chromosome Supplement Y chromosome is the male chromosome of... Read More

Primate

Definition noun, plural: primates Any of a group of placental mammals, particularly the prosimians and the... Read More

Y chromosome

Definition noun, plural: Y chromosomes The male-determining sex chromosome particularly in humans and other... Read More

Allantois

Definition noun, plural: allantoises or allantoides An embryonic diverticulum of the hindgut of reptiles, birds, and... Read More

Dictyate

Definition noun A resting phase in mammalian oogenesis wherein the developing oocyte is arrested in prophase I of meiosis... Read More

Theria

Definition noun A taxonomic group (subclass) comprised of metatherian and eutherian mammals Supplement Theria is a subgroup... Read More

Marsupial

Definition noun (zoology) A mammal primarily characterized by having a pouch used for carrying their immature young, and... Read More

Anamniote

Definition noun, plural: anamniotes Any of the vertebrates that do not belong to the Amniota, and in which an amnion does... Read More

Melatonin

Definition noun, plural: melatonin or melatonins The hormone involved in the regulation of several physiological mechanisms... Read More

Synapsid

Synapsid refers to any of the animals belonging to class Synapsida. These animals first appeared in the late Permian period... Read More

Sex-determining Region Y gene

Definition noun The gene that codes for the SRY protein, which is associated with the testicular development in many male... Read More

Fasciola hepatica

Definition noun A liver fluke belonging to the family Fasciolidae of the class Trematoda, and is endemic in the U.S.,... Read More

Argipressin

Definition noun, plural: argipressins A vasopressin that has an amino acid sequence:... Read More

Adaptive zone

Definition noun, plural: adaptive zones An ecological opportunity for the development of adaptive radiation, enabling a... Read More

Enterococcus faecalis

Definition Non-motile, gram-positive, facultatively anaerobic, microbial species that normally dwells in the... Read More

Semilunar valve

The human heart structure consists of heart chambers (2 atria and 2 ventricles) that differ functionally from each other.... Read More

Homo sapiens sapiens

Homo sapiens What are homo sapiens? Homo sapiens is the species of all the highly developed primates on earth, a category... Read More

Memory T cell

Definition noun, plural: memory T cells A long-lived T cell that bears receptors for an antigen during its encounter with a... Read More

Cytotoxic T cell

Definition noun, plural: cytotoxic T cells A T cell responsible for inducing death to target cells (e.g. infected somatic... Read More

Natural killer T cell

Definition noun, plural: natural killer T cells A T cell capable of destroying infected cells and infective particles upon... Read More

T-helper cell

Definition noun, plural: T-helper cells A type of T lymphocyte that assists by activating antigen-presenting leukocytes,... Read More

Extracellular digestion

Definition noun A form of digestion wherein the breaking down of materials into smaller, absorbable components takes place... Read More

White adipose tissue

Definition noun, plural: white adipose tissues A type of adipose tissue found in mammals used to store energy and acts as... Read More