Pelvis I: Bones and Muscles

Pelvis I: Bones and Muscles

REPRODUCTIVE PHYSIOLOGY: Part TwoMale REPRODUCTIVE PHYSIOLOGY: Part TwoMale

Introduction--why is pelvis so hard? ReviewMale Reproductive Organs Male Orgasm Making a new humanwhat its all about Sperm Production Hormonal Control of Male Development, Sex Drive and Sperm Production Why is the pelvis hard

Private parts dont uncover except in most intimate setting (or medical setting!) Not comfortable seeing or talking about (except jokes) Now serious-many medical

issues Realize and confront, not dehumanize--develop professional manner and language--starts with anatomy Frolich, Human Anatomy, Reproductive Physiology Frolich, Human Anatomy, Pelvis I Male reproductive organs

Sperm produced in testes (left, right) Carried by vas deferens (left, right) up into abdominal cavity (millions of sperm in a few drops of testicular fluid) Join with urethra at base of penis Semen made by prostrate and seminal glands at base of penis Ejaculationsperm travel from testes, joined by semen, expelled through erect penis

The pelvic floor (review) MAIN STRUCTURES Ischial tuberosity Pubic symphysis Coccyx Sacrotuberous ligament Ischipubic ramus Perineal body Anus External urethral opening Vaginal opening Frolich, Human Anatomy, Pelvis I

MUSCULAR FLOOR AND SPHINCHTERS transverse perineal m. Anal triangle and urogentical triangle Levator ani m. Urogenital diaphragm EXTERNAL GENITALIA Clitoris or penis Ischiocavernosus m. Bulbospongiosus m.

(and labia majorum) Frolich, Human Anatomy, Pelvis I n male: No vaginal opening Urethra enters into penis Bulbospongiusus and schiocavernosus surround spongy erectile tissues at base of penis Frolich, Human Anatomy, Pelvis I

Penis anatomydetails Spony erectile tissues Paired corpora cavernosa with ischiocavernosus muscle at base Midline, ventral corpus spongiusum with urethra running down middle and bulbospongiosus at base Glans penis is head or tip of penis

Male Orgasm Male Orgasm Arousal Phase: Penis spongy tissue engorge leading to erection; Bulbo-urethral gland secretions lubricate urethra and glans of penis Emission Phase: Testicular fluid moves through vas deferens; Seminal vessicles and prostate

gland begin rhythmic contractions of ducts; Bladder and internal urethral sphinchter contract so that semen does not enter bladder Ejaculation/Orgasm Phase: Ischiocavernosus (stiffens penis) and Bulbospongiosus (moves semen towards end of urethra) muscles contract in pelvic floor; elevanted heart rate and blood pressure; intense pleasure sensations Resolution Phase/Detumescence:

Tension release; blood leaves erectile tissue; erection subsides Starting a new personthe end game: How are genetic traits combined and passed on from parent to offspring (Basic Bio review)

Meiosis produces gametes or sex cells (eggs and sperm) with just one member of each chromosome pair Fertilization results in union of female gamete (egg) with male gamete (sperm) Subsequent embryonic, fetal and embryonic development by mitosis and differentiation of cell types produces new individual

Meiosis (Basic Bio Review) Two nuclear divisions occur to make 4 haploid cells (cells with just one member of each chromosome pair) Meiosis results in gametes (egg and

sperm) Has 8 phases (4 in each meiosis I & II) So where does meiosis happen?

Tissue of testes is full of seminiferous tubules In walls of tubules, stem cells that give rise to sperm are constantly undergoing meiosis Sperm are then collected in epididymis

Sperm that are not ejaculated are reabsorbed back into testicular tissue Sustentacular cells

Form thick epithelial lining of seminiferous tubules Tight junctiones between keep sperm proteins from entering bood

Produce testicular fluid which helps move sperm Concentrate testosterone to stimulate sperm production Produce inhibin which slows sperm production Spermatogenesis

Sperms form in walls of seminiferous tubules Spermatogenic cells within sustentacular cells Meiosos proceeds as spermatocytes move towards lumen (4 sperm from each spermatocyte) Seminiferous tubulerete testis head/body/tail

epididymis vas deferens (through spermatic cord around bladder) urethra Vasectomy Vas deferens is cut Semen production and ejaculation are as before Sperm cannot travel through epididymis (in drops of testicular fluid)

to join semen As before, unejaculated sperm are reabsorbed into testicular fluid Hormonal Control of Sperm Formation and Male Development

Recently Viewed Presentations

  • The Master of Physical Therapy Program Overview Introductions

    The Master of Physical Therapy Program Overview Introductions

    For the purpose of calculating the Admission Average, terms are not divided - even if only one course is needed to reach 60 credit units, all the courses in that term are taken. Multi Mini Interview (MMI)
  • WINDPOWER - Rutgers Physics & Astronomy

    WINDPOWER - Rutgers Physics & Astronomy

    The amount of energy which the wind transfers to the rotor depends on the density of the air, the rotor area, and the wind speed. The kinetic energy of a moving body is proportional to its mass (or weight). The...
  • Leading by Putting Your Followers First - Office of Diversity ...

    Leading by Putting Your Followers First - Office of Diversity ...

    Co-workers. Effectiveness of immediate supervisor most important variable in predicting levels of employee satisfaction, engagement and commitment ... Culture is the integrated pattern of thoughts, communications, actions, customs, belief, values, and institutions associated, wholly or partially ...
  • MOLECULAR DYNAMICS SIMULATION OF STRESS INDUCED GRAIN BOUNDARY

    MOLECULAR DYNAMICS SIMULATION OF STRESS INDUCED GRAIN BOUNDARY

    Strain energy density Apply strain εxx=εyy=ε0 and σzz=0 to perfect crystals, measure stress vs. strain and integrate to get the strain contribution to free energy Includes non-linear contributions to elastic energy Expand stress in powers of strain:
  • September GATE Equity Webinar School Climate 101: Behavior

    September GATE Equity Webinar School Climate 101: Behavior

    Use 6 words to describe your connection to School Climate . ... Ensuring Educational Equity Goes Beyond Equality. Requires education leaders to develop an understanding of ... and ways to dismantle systemic barriers so that the students in our schools...
  • A Bird In The Hand Is Worth Two In The Bush:

    A Bird In The Hand Is Worth Two In The Bush:

    Etymology Study- First ½ November Etymology study helps you spell challenging words. It helps you understand new, interesting words. It might make you a word nerd!
  • Presentation from the 2011 Water Program Peer Review

    Presentation from the 2011 Water Program Peer Review

    Theoretical modeling indicated decreasing passage survival with increasing fish size and approach velocity for one turbine design and 100% survival across all fish sizes and approach velocities modeled for another turbine. The flume studies are the first to empirically quantify...
  • RNGs in options pricing

    RNGs in options pricing

    Option[1] Call options: gives the holder the right, but not the obligation to buy the underlying, S, at a certain date, T, for a certain price, known as the exercise (or strike) price, X.