BIO202 Lab 18

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Jan 9, 2024

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Lab 18 The Reproductive System BIO202L Student Name: David Khaliqi Access Code (located on the lid of your lab kit): AC-DA2RP5 Lab Report Format Expectations Utilize college level grammar and professional formatting when completing this worksheet. Submissions without proper formatting, all required photos or sufficient responses will be rejected. Pre- lab Questions 1. Oogenesis and spermatogenesis are related in that they both ultimately produce haploid cells and share similar meiotic and mitotic cell division, but there are significant differences between the two. Discuss these similarities and differences below in your own words. Focus on the timing, steps and phases of these processes in order to compare and contrast them. (Hint: Your response should be 6-10 sentences in length.) The similarities between oogenesis and spermatogenesis is that they are both involved in the formation of reproductive cells (gametes), sperm in males and eggs in females. Both undergo meiosis (2 rounds), mitosis, and are stimulated by hormones. They both also go through cellular multiplication, growth and eventually differentiation. There differences are: Spermatogenesis occurs in the testes (males) whereas oogenesis occurs in the ovaries (females). In men, spermatogenesis begins at puberty whereas oogenesis begins in the womb as an embryo. Oogenesis results in the production of 1 viable egg and polar bodies (which wither away). Spermatogenesis produces 4 functional sperm cells. In terms of size, the egg is much larger than the sperm hense having more cytoplasm in order to provide nourishment to the new embryo.
Lab 18 The Reproductive System BIO202L EXPERIMENT 1: MICROSCOPIC ANATOMY OF THE REPRODUCTIVE SYSTEM Data and Observations 1. Label the arrows in the following two slides. A. Corpus Spongiosum B. Septa (arrow is not clear in pointing) C. Seminiferous Tubules D. Midpiece E. Flagella F. Head G. Myometrium (Arrow not clear in showing) H. Endometrium I. Uterine Glands
Lab 18 The Reproductive System BIO202L
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Lab 18 The Reproductive System BIO202L
Lab 18 The Reproductive System BIO202L
Lab 18 The Reproductive System BIO202L Results and Discussion 1. What type of epithelium did you observe in the prepared slide of the penis? In the prepared slide of the penis, I observed stratified squamous epithelium. 2. Which layer of the uterus forms a new functional layer each month? The endometrium layer of the uterus forms a new functional layer each month.
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Lab 18 The Reproductive System BIO202L EXPERIMENT 2: VIRTUAL MODEL - THE REPRODUCTIVE SYSTEM Introduction Questions 1. How is the reproductive system unlike the other systems of the body? Focus on the purpose of this system as compared to the others in your response. ( Hint : This difference is discussed in the lab materials.) The main difference between the reproductive system and the other systems is that the other system's ultimate goal is the preservation of the individuals life whereas the reproductive system's goal is the continuation of the species (perpetuation of life). Without this, the species would go extinct within one generation.
Lab 18 The Reproductive System BIO202L Data and Observations Insert screenshot of the seminal vesicle below.
Lab 18 The Reproductive System BIO202L Insert screenshot of the epididymis below.
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Lab 18 The Reproductive System BIO202L Insert screenshot of the corpus luteum:
Lab 18 The Reproductive System BIO202L Insert screenshot of the endometrium below.
Lab 18 The Reproductive System BIO202L Results and Discussion 1. What is the most superior part of the male reproductive system? What is the most superior part of the female reproductive system? The most superior part of the male reproductive system is the testes located in the scrotum but you could also point to the deferent ducts based on the model. the most superior part of the female reproductive system is the fallopian tube attached to the ovaries. 2. Which component of the female reproductive tract is more medial: the corpus luteum or the myometrium? The myometrium is more medial component of the female reproductive tract. 3. How many seminal vesicle(s) are there in the male reproductive system? There are 2 seminal vesicles in the male reproductive system. 4. Relate the location of the myometrium to the endometrium. The myometrium is located between the endometrium which is inner layer of the uterine wall and the serous coat which is the outer layer of the uterine wall. 5. Relate the location of the prostate to the deferent duct. The prostate is located superior to where the deferent duct begins at the point of attachment to the epididymus.
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Lab 18 The Reproductive System BIO202L EXPERIMENT 3: FETAL PIG DISSECTION - THE REPRODUCTIVE SYSTEM Introduction Questions 1. As stated in Step 4 of the experimental procedure, you should have already determined the sex of your pig. If you have not, do this before beginning the experiment as this will determine which set of procedures you execute. State the sex of your pig, below, and discuss how you determined this. The sex of the pig is male, determined by the presense of external male sexual organ. 2. What is meant by urogenital opening? You will need to identify this in order to begin your experiment. Urogenital openings for both gender serve the purpose of waste excretion and reproductive purpose. It is the point where internal "fluids" leave the body as well as reproductive function.
Lab 18 The Reproductive System BIO202L Data and Observations Insert a high resolution photo of the fetal pig you observed at the end of the experimental procedure, before you prepare it for storage . Your photo must include: ● Your handwritten name and access code must be clearly visible in the background. ● The required anatomical features as stated in either Step 8 for a male pig, or step 5 for female pig. You must have the correct anatomical features shown for credit. Photos not meeting these requirements, or that are of too low a resolution to clearly make out these features, will result in this lab submission being rejected.
Lab 18 The Reproductive System BIO202L Results and Discussion 1. Describe any observations you made while dissecting the reproductive system of your pig. While dissecting the male pig, I started from the kidneys and following the ureter, found the urine bladder. From the bladder, the urethra was followed until we reached the male sex organs. Although I had made incisions which damaged where the vas deferens would have been, it was easy to deterine the gender of the pig as the testes and penis were easily recognisable. 2. Why do most male mammals have testes in an external sac? Sperm production is most efficient at a temperature 1-2 degrees centigrade below core body temperature. To facilitate this, the testes are stored in the scrotum outside of the body thereby allowing for this change in temperature. 3. What are two functions of the vagina? Two of the many functions of the vagina are, birth canal (a passage for the fetus to exit the womb) and a receptacle for the penis during intercourse (facilitating sperm deposit).
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