PPT-Gametogenesis ( spermatogenesis)

Asslic Reham Saad Kadhum Objectives At the end of lecture u should know about 1 Describe the spermatogenesis and spermiogensis 2 Drawing the important stages in transformation of human spermatid into the spermatozoon . 11.4.1. Germinal epithelium cells (spermatogonium). Sertoli cell. Developing spermatozoa. spermatids. Leydig cell. Each time a spermatogonium divides it may either undergo mitosis, to maintain the number of spermatogonia, or spermatogenesis.. BIOLOGY. u. sing self-fertile nematodes to explore the evolution of genes, genomes, and reproductive isolation. . Eric Haag. Caenorhabditis. reproductive diversity in free-living nematodes (Class . Chromadorea. Understanding:. Spermatogenesis and oogenesis both involve mitosis, cell growth, two divisions of meiosis and differentiation.. Processes in spermatogenesis and oogenesis result in different numbers of gametes with different amounts of cytoplasm. oach. Vertika Singh. Doctoral Student. Department of Molecular & Human Genetics. B.H.U., Varanasi. 6. th.  World Congress on Biotechnology . Infertility applies to couples who fail to achieve a pregnancy after 1 year of regular coitus without any contraception.. Testis weighs about 20 GM and has volume of 15-25 ml, small testicle when the volume is less than 12 ml. The testicular volume could be measured by ultrasound using ellipsoid formula( . lenghth. *width*thickness*,52). Ovum. = female component. Spermatozoa. = male component. Both arise through . meiosis. = cell division where each daughter cell receives ½ genetic material from original cell. Primordial germ cells derived from . Hekmat. El-. Gammal. 2018. Lecture 3. Lecture Objectives. On completion of this lecture, students will be able to:. Define the origin of primordial germ cells. . Understand common path of . gametogenesis. The cell cycle extends from the "birth " of a cell , resulting from cell reproduction , to the time the cell itself divides in two.. . The eukaryotic cell cycle. Mitosis :-. All living cells arise from pre-existing living cells.. The production of gametes (sex cells). Males = spermatogenesis in the testes. Females = oogenesis in the ovaries. Mitosis vs Meiosis. (Remember). . Diploid. Contain the full number (set) of chromosomes. and Fertilization Barry Bean for BioS 90 & 95 12 September 2008 Life is short. Especially if you’re a sperm cell! Used with permission of the artist, Patrick Moberg Try to remember… when you System . Lecturer . Dr. Samah A. Jassam BSc MSc PhD . MRSB. Al-Mustansiriya University . Collage of Pharmacy. Role . of the Reproductive System. :. The Function of Female reproductive system . 1- To . . Conversion of Germ Cells into Male and Female Gametes. Dr. . Ruqaya. . Alsmak. Senior Embryologist. Ibn-. Sina. University of Medical and Pharmaceutical Sciences. Primordial Germ Cells. Development begins with . TWO TYPES:. < SPEMATOGENESIS. < OOGENESIS. Begin from spermatogonia. . Each sperm take 30-60 day. . 300 million sperm product daily . spermatogenesis . Spermatogonia. . – sperm. Spermatocytogenesis. Primary spermatocyte –.