ANIMAL REPRODUCTION

• Gametogenesis


  Process of division of diploid cells to produce new haploid cells
• Fertilization


  • Fusion of male and female gametes resulting in formation of zygote (fertilized egg)
  • Occurs in the fallopian tube
• Implantation


  Attachment of fertilized egg in the uterine wall
• Gastrulation


  • Formation of three germ layers: ectoderm, mesoderm and endoderm
  • Each germ layer will give rise to specific tissues and organs
• Ectoderm


  Outermost layer
• Endoderm


  Innermost layer
• Mesoderm


  Middle layer between ectoderm and endoderm
• Embryonic Stage


  Also known as organogenesis
• Fetal Development


  Organs differentiate further and grow
• Sperm cells are produced by spermatogenesis in the seminiferous tubules within the testes.
• Spermatozoa are produced from the seminiferous tubules, which contain germinal epithelium (Sertoli cells).
• Ejaculation is the process by which sperm and secretions from accessory glands are expelled through the penis during sexual intercourse or masturbation.
• Implantation occurs when the fertilized egg attaches to the lining of the uterus.
• Fertilization takes place in the ampulla of the Fallopian tube.
• Epididymis stores spermatozoa until ejaculation occurs.
• Ovulation occurs when an ovum is released into the peritoneal fluid.
• The epididymis stores spermatozoa and transports them into the vas deferens.
• The placenta provides nutrients and oxygen to the developing embryo/fetus and removes waste products.
• The ovary produces oocytes that mature into eggs.
• Ovulation is the release of an egg from the ovary.
• Spermatogenesis involves the production of haploid gametes (sperm) from diploid cells through mitosis, meiosis, and differentiation.
• Implantation is the process by which the fertilized egg attaches itself to the uterine wall.
• Fertilization is the fusion of a sperm cell with an egg cell, resulting in the formation of a zygote.