Tag Archives | Mammalian Placenta

Physiology of Placenta in Mammals | Vertebrates | Chordata | Zoology

Placentation is the mechanism by which the foetal and maternal blood circulations are brought very close together for conducting various metabolic functions such as respiration, excretion and nutrition of foetus. In all histological types of placentae, there exists a placental barrier which may include two to six kinds of tissues. Due to the placental barrier, the blood of foetus and [...]

By Bhavya S|2017-07-14T08:37:45+00:00July 14, 2017|Mammals|Comments Off

Classification of Chorio-Allantoic Placenta | Chordate | Zoology

The chorio-allantoic placenta has been classified into various types on the basis of its morphology, arrangement of villi, histology and electron microscopy. A. Morphological Classification of Placenta: On the basis of closeness of foetal and maternal tissues, placentae may be of the following three types: 1. Non-Deciduous Placenta or Semiplacenta: In most mammals, the implantation is superficial, i.e, the blastocyst [...]

By Bhavya S|2017-07-14T08:37:45+00:00July 14, 2017|Mammals|Comments Off