29 results found

Search Results for: yolk

Chorion

Chorion Definition The chorion is a membrane that develops around the developing fertilized egg. It begins to develop... Read More

Gamete

Definition of Gamete What is a gamete? A gamete is the mature reproductive or sex cell that contains a haploid number of... Read More

Egg

Definition noun, plural: eggs (1) An organic vessel where an embryo develops, and one in which the female of an animal... Read More

Meroblastic cleavage

Definition noun (embryology) The incomplete cleavage in telolecithal or megalecithal eggs of animals, such as birds and... Read More

Unequal cleavage

Definition noun A holoblastic cleavage producing blastomeres of unequal size. Supplement An example is the holoblastic... Read More

Holoblastic cleavage

Definition noun (embryology) The complete division of an isolecithal or microlecithal egg into... Read More

Fetal membrane

Definition noun, plural: fetal membranes A membrane surrounding the embryo or fetus and is involved in nutrition,... Read More

Embryology

Embryology Definition Embryology is a branch of biology that deals with the topics concerning gamete formation... Read More

Egg white

Definition ''noun' The white or clear, gelatinous substance surrounding the egg yolk. Supplement The egg white serves to... Read More

Discoidal cleavage

Definition noun (embryology)A meroblastic cleavage wherein the cytoplasmic divisions are restricted to the animal pole,... Read More

Phospholipid

What is a phospholipid? Phospholipids are a subgroup of lipids. Other major types of lipids are fatty acids, sphingolipids,... Read More

Hematopoiesis

Definition noun, plural: hematopoieses A biological process in which new blood cells are formed, and is usually taking place... Read More

Food

Definition noun (1) A form of nourishing substance that is consumed (2) A substance that provides nourishment (3) A source... Read More

Superficial cleavage

Definition noun (embryology) A meroblastic cleavage wherein mitosis occurs without cytokinesis, resulting in many nuclei,... Read More

Oogonium

Definition noun, plural: oogonia (zoology) The diploid female gametogonium that gives rise to primary oocyte through... Read More

Metatherian mammal

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

Centrolecithal egg

Centrolecithal egg An egg in which the yolk is concentrated near the centre of the egg cell, as is the case in many of the... Read More

Amnion

Definition noun, plural: amnions The innermost membrane of the extraembryonic or the fetal membranes of amniotes surrounding... Read More

Blastula

Human embryology is a fascinating subject and has succeeded in captivating the attention of human beings for ages.... Read More

Midgut

Definition noun (1) The middle portion of the alimentary canal of certain vertebrate animals in which it is continuous with... Read More

Metamerism

Metamerism Definition Metamerism is the repetition of homologous body segments. This type of development can be seen in the... Read More

Embryo

An embryo refers to the early developmental stage of a multicellular organism that follows fertilization. This stage... Read More

Splanchnic

Definition adjective Of, pertaining to, relating to, near to, or describing the viscera or entrails;... Read More

Egg cell

Definition noun, plural: egg cells (1) Female gamete; female sex cell; female reproductive cell. (2) Unfertilized ovum,... Read More

Ovum

Definition noun, plural: ova (1) Female gamete; female sex cell; female reproductive cell. (2) Egg cell. Supplement In... Read More

Cholesterol

Definition noun A sterol or a modified steroid that is synthesized by animal cells to become an essential component of... Read More

Placenta

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

Aves

Aves Definition What are birds classified as? Birds constitute the class Aves of the kingdom Animalia. How to define Aves?... Read More

Synapsid

Any member of the Synapsida clade of animals is referred to as a synapsid. They are believed to have descended from the... Read More