This powerpoint presentation covers Topic 11.4 (Reproduction) in the IB Biology curriculum. Each slide is labelled with the specific learning objective and animation/video links are provided in the slide notes.
The slides are formatted to print well for handouts or revision and I can provide a pdf version upon request.
As always, please let me know if you have any suggestions for improvements. These are always a work in progress!
**IB Biology Learning Objectives
11.4.1 – Annotate a light micrograph of testis tissue to show the location and function of interstitial cells (Leydig cells), germinal epithelium cells, developing spermatozoa and Sertoli cells.
11.4.2 – Outline the processes involved in spermatogenesis within the testis including mitosis, cell growth, the two divisions of meiosis and cell differentiation.
11.4.3 – State the role of LH, testosterone and FSH in spermatogenesis.
11.4.4 – Annotate a diagram of the ovary to show the location of germinal epithelium, primary follicles, mature follicle and secondary oocyte.
11.4.5 – Outline the processes involved in oogenesis within the ovary, including mitosis, cell growth, the two divisions of meiosis, the unequal division of cytoplasm and the degeneration of polar body.
11.4.6 – Draw and label a diagram of a mature sperm and egg.
11.4.7 – Outline the role of epididymis, seminal vesicle and prostate gland in the production of semen.
11.4.8 – Compare the processes of spermatogenesis and oogenesis, including the number of gametes and the timing of the formation and release of gametes.
11.4.9 – Describe the process of fertilization, including the acrosome reaction, penetration of the egg membrane by a sperm and the cortical reaction.
11.4.10 – Outline the role of HCG in early pregnancy.
11.4.11 – Outline early embryo development up to the implantation of the blastocyst.
11.4.12 – Explain how the structure and functions of the placenta, including its hormonal role in secretion of estrogen and progesterone, maintain pregnancy.
11.4.13 – State that the fetus is supported and protected by the amniotic sac and amniotic fluid.
11.4.14 – State that materials are exchanged between the maternal and fetal blood in the placenta.
11.4.15 – Outline the process of birth and its hormonal control, including the changes in progesterone and oxytocin levels and positive feedback.