In the simplest type of placenta,the foetal b | vedclass

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(C) In the simplest type of placenta (epitheliochorial),there are six barriers between the foetal and maternal blood: $(1)$ foetal endothelium,$(2)$ f

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(C) In the simplest type of placenta (epitheliochorial),there are six barriers between the foetal and maternal blood: $(1)$ foetal endothelium,$(2)$ foetal connective tissue,$(3)$ foetal chorionic epithelium,$(4)$ maternal uterine epithelium,$(5)$ maternal connective tissue,and $(6)$ maternal endothelium.In humans,the placenta is of the haemochorial type,where the maternal blood comes into direct contact with the foetal chorionic epithelium.Therefore,the three maternal barriers—$(4)$ uterine epithelium,$(5)$ uterine connective tissue,and $(6)$ endothelium of maternal blood vessels—are lost.

Column-$I$	Column-$II$
$A$. $1^{st}$ month	$i$. First movement of foetus
$B$. $2^{nd}$ month	$ii$. Major organ system
$C$. $3^{rd}$ month	$iii$. Foetal heart
$D$. $5^{th}$ month	$iv$. Limbs $\&$ digits

In the simplest type of placenta,the foetal blood is separated from the maternal blood by six barriers. How many barriers are lost in the human placenta?

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Match the following:

Column-$I$ Column-$II$

$A$. $1^{st}$ month $i$. First movement of foetus

$B$. $2^{nd}$ month $ii$. Major organ system

$C$. $3^{rd}$ month $iii$. Foetal heart

$D$. $5^{th}$ month $iv$. Limbs $\&$ digits

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