What is placenta ?Give its functions ?

What is placenta? Write its function.

What is placenta ? Describe its functions.

(a) How is polyspermy prevented in human ? (b) What is placenta ? Write four functions of human placenta.

What is placenta ? Explain the functions of placenta.

What is Placenta ? Write four functions of Human Placenta.

What is typhlosole? Give its function.

What is blubber ? Give its function.

What is salt bridge? Give its functions.