Vitelline
Vitelline
Vitelline (pronunciation: vih-TELL-een) is a term used in embryology and anatomy to refer to structures related to the yolk sac or yolk of an egg. The term is derived from the Latin word 'vitellus', meaning 'yolk'.
Etymology
The term 'vitelline' is derived from the Latin 'vitellus', which means 'yolk'. This is in reference to the yolk sac or yolk of an egg, which is a crucial part of the development of an embryo.
Vitelline Structures
There are several structures in embryology and anatomy that are referred to as 'vitelline'. These include:
- Vitelline Duct: This is a narrow tube that connects the midgut of the embryo to the yolk sac. It usually disappears during the 7th week of embryonic development.
- Vitelline Veins: These are paired veins that drain blood from the yolk sac to the sinus venosus of the embryo.
- Vitelline Membrane: This is the membrane that surrounds the yolk of an egg, providing protection and nutrients to the developing embryo.
- Vitelline Arteries: These are paired arteries that supply blood to the yolk sac.
Related Terms
- Yolk Sac: This is a membranous sac attached to an embryo, providing early nourishment in the form of yolk in birds and reptiles, and contributing to the formation of the digestive system and producing the first blood cells and future egg or sperm cells in mammals.
- Embryology: This is the branch of biology that studies the prenatal development of gametes (sex cells), fertilization, and development of embryos and fetuses.
- Anatomy: This is the branch of biology concerned with the study of the structure of organisms and their parts.
External links
- Medical encyclopedia article on Vitelline
- Wikipedia's article - Vitelline
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