Changes

<br />

<br />

<br />

<br />

Nutrition is supplied by uterine secretions/debris, often referred to as 'uterine milk'. Uterine milk secretions are usually maintained by '''progesterone'''. Pinocytosis (cellular drinking) is the main exchange mechanism.  

Nutrition is supplied by uterine secretions/debris, often referred to as 'uterine milk'. Uterine milk secretions are usually maintained by '''progesterone'''. Pinocytosis (cellular drinking) is the main exchange mechanism.

 

Haemotrophic exchange is the main exchange mechanism utilised in most types of placenta. This type of exchnage utilises direct transfer of nutrients from the maternal to foetal blood via simple diffusion, facillitated diffusion, active transport and complex diffusion.

* '''Sheep,cow,dog and cat''': pinocytosis persists via '''haemophagous zones''' that break down and release iron to the placenta.

 

 

 

* Direct transfer of nutrients from the maternal to foetal blood via the placenta. By Simple Diffusion, Facillitated Diffusion, Active Transport and Complex Diffusion

==Placental Blood Supply and Drainage==

==Placental Blood Supply and Drainage==