Embryology

processes in fertilization

Embryonic cell structure

thumb|A Lepisosteus oculatus|spotted gar larva at 22 days stained for cartilage (blue) and bone (red)

non-embryonic supportive membranes of animal embryos

Dacryocystocele (Dacryocystitis) or timo cyst is a benign, bluish-gray mass in the inferomedial canthus that develops within a few days or weeks after birth. The uncommon condition forms as a result as a consequence of narrowing or obstruction of the nasolacrimal duct, usually during prenatal development. Nasolacrimal duct obstruction disrupts the lacrimal drainage system, eventually creating a swelling cyst in the lacrimal sac area by the nasal cavity. The location of the cyst can cause respiratory dysfunction, compromising the airway. The obstruction ultimately leads to epiphora, an abundanc

early pregnancy loss during the mammalian embryo's development: in humans, loss in the second through eighth week after fertilization

Histotrophy is a form of matrotrophy exhibited by some live-bearing sharks and rays, in which the developing embryo receives additional nutrition from its mother in the form of uterine secretions, known as histotroph (or "uterine milk"). It is one of the three major modes of elasmobranch reproduction encompassed by "aplacental viviparity", and can be contrasted with yolk-sac viviparity (in which the embryo is solely sustained by yolk) and oophagy (in which the embryo feeds on ova).

structure formed early in vertebrate limb development.

theory that suggests that the environment of the foetus during development affects their disease risk later in life

anatomical structure

embryogenesis of the fruit fly Drosophila, a popular model system

protein-coding gene in the species Homo sapiens

small organ found in the neck region of many animals.