The $Isthmus$ is a part of which of the following?

Arrange the components of the mammary gland from proximal to distal:
$(a)$ Mammary duct
$(b)$ Lactiferous duct
$(c)$ Alveoli
$(d)$ Mammary ampulla
$(e)$ Mammary tubules
Choose the most appropriate answer from the options given below:

The aperture known as the $Ostium$ is present in which part of the female reproductive system?

The vaginal orifice,urethral orifice,and clitoris are protected by:

What is the homologue of the male penis in the female?

Draw a neat diagram of the female reproductive system and label the parts associated with the following:
$(a)$ production of gamete,
$(b)$ site of fertilisation,
$(c)$ site of implantation,and
$(d)$ birth canal.