[问答题]
Below is a diagram of the internal reproductive structure of a woma
ks k):g1n q 0isa52n6g+viids n du
k(: yhqs.us ifdk* yy9 xy3 rw/)hv,-yring pregnan
sy*( vxd, 9ki) h.uskyrh:yyf3 /wyq-cy.
1.1.Label the placenta using the letter P.
1.2.Explain how the structure of the placenta is related to its function.
1.3.Suggest an outcome if the placenta does not produce enough of the correct hormones during pregnancy.
2.Outline the role of progesterone in pregnancy.