Fetus in Biological Definition

Twin

... but not necessarily, born on the same day. A fetus alone in the womb is called a singleton . Due ... the production of male sex hormones , this fetus develops as a girl by default, but a girl with ... article: Parasitic twin Sometimes one twin fetus will fail to develop completely and continue to ...

Antibody

... and in tissue liquids. It is important that this is the only isotype that can traverse trough the placenta , because this gives protection to the fetus in its first weeks of life, when its own immune system has not yet developed. It can bind to many kinds of pathogens, for example viruses , ...

Developmental biology

... , chorion , chrysalis , cleavage , ectoderm , embryo , embryogenesis , embryogeny , embryology , endoderm , extra-embryonic membrane , fetus (or foetus ), gastrula , gastrulation , germ layer , germ plasm , germination , induction , juvenile , larva , maternal effect , mesoderm ...

Edward's syndrome

... sometimes egg and sperm cells are left with 24 (or more) chromosomes. It is the joining of these egg or sperm cells that eventually cause a trisomy fetus to be formed. It is this extra genetic information that causes all the trouble for individuals with Edward's Syndrome. As each and every cell in ...

Homeobox

... Thus, by providing the identity of particular body regions, Hox genes determine where limbs and other body segments will grow in a developing fetus or larva . Mutations in any one of these genes can lead to the growth of extra, typically non-functional body parts in invertebrates , but ...

Human

... called a zygote ; as it grows through successive stages inside the female's uterus over a period of 38 weeks, it is called an embryo , then a fetus . At birth, the fully grown fetus, now called a baby , is expelled from the female's body and breathes independently for the first time, at which ...

Liver

... liver stores of a multitude of substances, including glucose in the form of glycogen, vitamin B12 , iron , and copper . In the first trimester fetus , the liver is the main site of red blood cell production. By the 42nd week of gestation, the bone marrow has almost completely taken over that ...

Lung

... gills ). The evolutionary origin of both are thought to be outpocketings of the upper intestines. This is reflected by the fact that the lungs of a fetus also develop from an outpocketing of the upper intestines (see ontogeny and phylogeny ). The article on swim bladders contains further details ...