Search Results for: annelids
Metamerism
Metamerism Definition Metamerism is the repetition of homologous body segments. This type of development can be seen in the... Read More
Kingdom Animalia
Kingdom Animalia Definition Each person can say that they know of or can name at least one animal. However, do people know... Read More
Holoblastic cleavage
Definition noun (embryology) The complete division of an isolecithal or microlecithal egg into... Read More
Closed circulatory system
Definition noun A type of circulatory system where blood circulates within closed vessels, thus, blood is distinct from... Read More
Triploblastic
Triploblastic Definition A triploblastic animal had three main layers of tissue during embryonic development. The central... Read More
Circulatory system
Circulatory System Definition noun The organ system responsible for the circulation and transport of oxygen, carbon... Read More
Embryology
Embryology Definition Embryology is a branch of biology that deals with the topics concerning gamete formation... Read More
Amoebocyte
Amoebocyte (Science: organism) phagocytic cell found circulating in the body cavity of coelomates (particularly annelids and... Read More
Stomodaeum
stomodaeum 1. (Science: anatomy) A part of the alimentary canal. See mesenteron. 2. (Science: zoology) The primitive mouth... Read More
Peritoneum
What is the Peritoneum? The term peritoneum refers to the serous membrane that constitutes the biologically active inner... Read More
Anarthropoda
Anarthropoda (Science: zoology) One of the divisions of articulata in which there are no jointed legs, as the annelids;... Read More
Circulatory fluid
Definition noun The fluid confined within the vessel in a closed circulatory system or that contained in a cavity (hemocoel)... Read More