(a) Corpus luteum − Corpus luteum is formed from the ruptured Grafiaan follicle. It secretes progesterone hormone during the luteal phase of the menstrual cycle. A high level of progesterone inhibits the secretions of FSH and LH, thereby preventing ovulation. It also allows the endometrium of the ** to proliferate and to prepare itself for implantation.
(b) Endometrium − It is the innermost lining of the **. It is rich in glands and undergoes cyclic changes during various phases of the menstrual cycle to prepare itself for the implantation of the embryo.
(c) Acrosome − It is a cap-like structure present in the anterior part of the head of the . It contains hyaluronidase enzyme, which hydrolyses the outer membrane of the egg, thereby helping the to penetrate the egg at the time of fertilization.
(d) Sperm tail − It is the longest region of the that facilitates the movement of the inside the female reproductive tract.
(e) Fimbriae − They are finger-like projections at the ovarian end of the fallopian tube. They help in the collection of the ovum (after ovulation), which is facilitated by the beating of the cilia.
