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The PLACENA AND UMBILICAL CORD- Definition, functions and more.

 The placenta is an organ that provides nutrients, oxygen and growing foetus and removes waste products from the blood.



FUNCTIONS OF THE PLACENTA 

(i) The placenta attaches the foetus to the uterine wall of the mother. 

(ii) It filters out urea or nitrogenous waste of baby's blood and transfers it to the mother's blood and kidneys. 

(iii) It absorbs digested food from the mother's blood and passes it on to foetus by diffusion. 

(iv) The placenta allows passage of ingredients or antibodies that protect the developing foetus against infection. 

(v) It exchanges CO, from the foetus' blood for oxygen from the mother's blood. 

(vi) It prevents the mixing of Total and mothers blood. 

(vii) The placenta produces the hormones that prevent ovulation and menstruation during pregnancy. 

(viii) lt prevents passage of some pathogens from mother to foetus. 

(ix) It converts glucose to fructose. 

(x) It allows the passage of drugs or vaccines and alcohol from mother to foetus.


The umbilical cord is a long thin material usually thicker than a string through which food nutrients are passed to the foetus from the mother.



FUNCTIONS OF THE UMBILICAL CORD

(i) The umbilical cord attaches the foetus to the placenta. 

(ii) The vein in the umbilical cord transports digested food and oxygenated blood from the placenta to the foetus. 

(iii) The artery transports waste metabolic products or excretory products and deoxygenated blood from the foetus to the placenta

(iv) It suspends foetus in the amniotic cavity.


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