Explain the difference between the following terms:
$(1)$ Spermatid - Spermatozoa
$(2)$ First polar body - Second polar body

(N/A) $(1)$ Spermatid: These are haploid cells produced at the end of the second meiotic division during the maturation phase of spermatogenesis.
Spermatozoa: These are motile,mature male gametes formed from spermatids through the process of spermiogenesis.
$(2)$ First polar body: During the maturation phase of oogenesis,the primary oocyte undergoes an unequal first meiotic division,resulting in a large secondary oocyte and a small first polar body.
Second polar body: During the maturation phase of oogenesis,the completion of the second meiotic division of the secondary oocyte results in the formation of a mature ovum and a tiny second polar body.