Fill in the blanks:

(i) Implantation is the process of fixing of the _______ in a pit in the wall of _______

(ii) Heart and circulatory system are formed in the embryo by the end of _______ months of pregnancy.

(iii) A cord containing _______ Vessels connects the _______ With the foetus.

(i) Implantation is the process of fixing of the embryo in a pit in the wall of the uterus.

Explanation: Implantation refers to the process of attaching a fertilized egg (embryo) onto the uterine walls.

(ii) Heart and circulatory system are formed in the embryo by the end of five months of pregnancy.

Explanation: Circulatory patterns are observed at the end of five months of pregnancy.

(iii) A cord containing blood Vessels connects the placenta with the foetus.

Explanation: The umbilical cord connects the foetus to the placenta. It is made up of three blood vessels - Two arteries and one vein.