Placenta - Anatomy & Physiology

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The placenta is an apposition of foetal and parental tissue for the purposes of physiological exchange. There is little mixing of maternal and foetal blood, and for most purposes the two can be considered as separate.

Exchange

Histotrophic
Haemotrophic
  • Direct transfer of nutrients from the maternal to foetal blood via the placenta.

Simple Diffusion

Facillitated Diffusion

Active Transport

Complex Diffusion

Placental Blood Supply and Drainage
Vascular Dynamics

Protection

Physical
Teratogens

Immunological

Endocrine