Lecture 13 - Epididymis, Ejaculation, Semen

Reading

Lecture 13:

Spermatozoa structure

Sperm metabolism

Sperm transport in the male tract

Epididymal Function

Hormonal control of the epididymis

Erection

Emission

Ejaculation

Ejaculate Characteristics - Fractions

Species

Time lapse for ejaculation

Composition of Ejaculate

Bull 1 second single fraction
Ram 1 second single fraction
Boar 5-25 minutes

fractionated

  • sperm-free
  • sperm-rich
  • coagulum
Stallion 30-60 seconds

fractionated

  • sperm-free
  • sperm-rich
  • mucus
Man 10-30 seconds single fraction but coagulated

Components of Bull Semen

Initial semen evaluation

Ejaculate Characteristics - specifications

Species Ejaculate Volume (ml) Sperm Concentration (X 109/ml) Total Sperm per Ejaculate (109) % Motile % Normal
Bull 8.0 1.5 12 75 95
Ram 1.0 3.0 3 95 95
Boar 200 .25 50 70 90
Stallion 80 .15 12 70 40 - 90
Man 2-6 .15 .9 65 30 - 70

Review Quizzes