2.Efferent ducts3.Epididymis 4.Ductus deferens 5.Ampulla of ductus deferens 6.Seminiferous tubules7.Ejaculatory duct 8.Prostatic urethra9.Membranous urethra 10. Spongy (penile) urethra 11. External urethral orifice Part C1.Head of nucleus: part of sperm that contains chromosomes 2.Spermatids: haploid cells formed when secondary spermatocytes undergo meiosis II3.Leydig cells: cells that secrete testosterone 4.Spermatogonia: diploid stem cells 5.Spermatogenesis: process that produces haploid sperm and diploid stem cells6.Sertoli cells: cells that surround spermatocytes and spermatids and provide chemicalenvironment for spermatogenesis7.Interstitial space: space within testes where Leydig cells are located 8.Primary spermatocytes: diploid cells that undergo meiosis I to form two haploid secondary spermatocytes9.Spermiogenesis: process that transforms spermatids into sperm 10. Mitochondria in midpiece: part of sperm that produces ATP11. Flagellum (tail): propels the sperm Using your Knowledge1.No, the whip-like motion of the flagellum only propels the sperm forward.2.Briefs; the briefs would be more likely to cause sterility because they hold the testes closer to the body, increasing testicular temperature 3.Testosterone 4.Sperm 5.Seminal fluid6.Prostatic fluid7.Bulbourethral fluid 8.No. The part of the vas deferens that is cut for a vasectomy is located outside the body wall in the spermatic cord9.A vasectomy doesn’t impede testosterone levels, having an erection, or having an ejaculation. Testosterone levels are controlled by the amount of testosterone secreted into the blood stream by Leydig cells in the testis. A penile erection is a parasympathetic innervation and ejaculation is a sympathetic innervation. The nerves fore penile erectionand ejaculation are not cut in a vasectomy. 10. Decreased testosterone secretion, atrophy of testes, baldness, and liver cancer.