{"id":435,"date":"2015-08-12T16:03:48","date_gmt":"2015-08-12T16:03:48","guid":{"rendered":"http:\/\/sites.msudenver.edu\/haysc\/?page_id=435"},"modified":"2025-09-29T17:23:28","modified_gmt":"2025-09-29T17:23:28","slug":"outline-4-bio-2320-male-reproductive-system","status":"publish","type":"page","link":"https:\/\/sites.msudenver.edu\/haysc\/biology-courses\/human-anatomy-and-physiology-ii-homepage-bio-2320\/outline-4-bio-2320-male-reproductive-system\/","title":{"rendered":"Outline-4, BIO 2320 Male Reproductive System"},"content":{"rendered":"

II. MALE REPRODUCTIVE SYSTEM<\/strong><\/p>\n

A. Scrotum (cremaster)<\/p>\n

Supports testes, cremaster muscle can move testes closer to or farther from body<\/em><\/p>\n

B. Testes<\/strong>– Male gonad<\/em><\/p>\n

1. Tunica albuginea<\/p>\n

Dense white connective tissue covering testis<\/em><\/p>\n

2. Lobules (200-300) –\u00a0Compartments<\/em><\/p>\n

3. Seminiferous tubules<\/strong><\/p>\n

Tightly coiled tubules where sperm are produced<\/em><\/p>\n

Spermatogenesis<\/strong>\u00a0(5-10 weeks) (300 million\/day) – process of making sperm<\/p>\n

1. Spermatogonia [mature, grow to become…]\n

2. Primary spermatocytes [meiosis I…]\n

3. Secondary spermatocytes [meiosis II…]\n

4. Spermatids<\/p>\n

Haploid, matures to…<\/em><\/p>\n

5. Spermatozoon<\/p>\n

a. Head<\/p>\n

-Nucleus<\/p>\n

-Acrosome<\/p>\n

b. Midpiece – numerous mitochondria<\/p>\n

c. Tail – propels<\/p>\n

4. Straight tubules<\/p>\n

5. Rete testes – tubular network<\/p>\n

6. Interstitial cells (Leydig)<\/p>\n

a. Testosterone<\/strong><\/p>\n

1. Sperm production<\/p>\n

2. Sexual drive<\/p>\n

3. Secondary sex characteristics<\/p>\n

C. Puberty<\/p>\n

1. Signs<\/p>\n

2. Hormones<\/p>\n

a. Testosterone\u00a0<\/strong>made by interstitial cells of testes<\/p>\n

b. GnRH\u00a0<\/strong>= Gonadotropin Releasing Hormone,\u00a0Stimulates pituitary gland to produce:<\/em><\/p>\n

c. LH = ICSH\u00a0<\/strong>– Interstitial cell stimulating hormone<\/p>\n

d. FSH<\/strong>-Stimulates spermatogenesis<\/em><\/p>\n

e. Inhibin<\/strong><\/p>\n

Inhibits FSH<\/em><\/p>\n

\"Male<\/a><\/p>\n

D. Epididymis<\/strong><\/p>\n

Comma-shaped, posterior to testis<\/em><\/p>\n

1. Head<\/p>\n

Superior, receives sperm from testes<\/em><\/p>\n

2. Body<\/p>\n

3. Tail<\/p>\n

Inferior, empties into ductus deferens<\/em><\/p>\n

E. Ductus deferens (vas)<\/strong><\/p>\n

1. Spermatic cord<\/p>\n

Includes ductus deferens plus vessels, nerves…<\/em><\/p>\n

2. Inguinal canal<\/p>\n

Passageway through body wall for spermatic cord<\/em><\/p>\n

F. Urethra<\/strong><\/p>\n

1. Prostatic<\/p>\n

2. Membranous<\/p>\n

after prostate, before penis<\/em><\/p>\n

3. Spongy = Penile<\/p>\n

through penis to…<\/em><\/p>\n

4. External urethral orifice<\/p>\n

G. Accessory sex glands<\/p>\n

1. Seminal vesicles<\/strong><\/p>\n

2. Prostate<\/strong><\/p>\n

3. Bulbourethral (Cowper’s)<\/strong><\/p>\n

4. Semen<\/strong><\/p>\n

Sperm plus liquids from accessory sex glands which nourishes sperm, buffers acid pH in vagina, helps to propel and activate sperm , 2 1\/2 – 5 mls per ejaculate, about 300 million sperm<\/em><\/p>\n

H. Penis<\/strong><\/p>\n

1. Erectile tissue<\/p>\n

Vascular<\/em><\/p>\n

2. Corpus cavernosum<\/p>\n

Dorsolateral penis, responsible for most of erection<\/em><\/p>\n

3. Corpus spongiosum<\/p>\n

Erectile tissue surrounding urethra<\/em><\/p>\n

4. Glans penis<\/p>\n

Distal end of penis covered by…<\/em><\/p>\n

5. Prepuce –\u00a0Foreskin<\/em><\/p>\n

I. Sexual responses<\/p>\n

1. Erection<\/p>\n

Penis enlargement and rigidity, vascular phenomenon, parasympathetic nerve impulses cause arteriole dilation<\/em><\/p>\n

2. Emission<\/p>\n

First part of male orgasm mediated by sympathetic nerve impulses resulting in propulsion of sperm to urethra and release of seminal fluids from accessory sex glands<\/em><\/p>\n

3. Ejaculation<\/p>\n

Contractions that result in release of semen from urethra<\/em><\/p>\n

 <\/p>\n","protected":false},"excerpt":{"rendered":"

II. MALE REPRODUCTIVE SYSTEM A. Scrotum (cremaster) Supports testes, cremaster muscle can move testes closer to or farther from body B. Testes– Male gonad 1. Tunica albuginea Dense white connective tissue covering testis 2. Lobules (200-300) –\u00a0Compartments 3. Seminiferous tubules … Continue reading →<\/span><\/a><\/p>\n","protected":false},"author":270,"featured_media":0,"parent":209,"menu_order":0,"comment_status":"closed","ping_status":"open","template":"","meta":{"_exactmetrics_skip_tracking":false,"_exactmetrics_sitenote_active":false,"_exactmetrics_sitenote_note":"","_exactmetrics_sitenote_category":0,"footnotes":""},"class_list":["post-435","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/sites.msudenver.edu\/haysc\/wp-json\/wp\/v2\/pages\/435","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/sites.msudenver.edu\/haysc\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/sites.msudenver.edu\/haysc\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/sites.msudenver.edu\/haysc\/wp-json\/wp\/v2\/users\/270"}],"replies":[{"embeddable":true,"href":"https:\/\/sites.msudenver.edu\/haysc\/wp-json\/wp\/v2\/comments?post=435"}],"version-history":[{"count":0,"href":"https:\/\/sites.msudenver.edu\/haysc\/wp-json\/wp\/v2\/pages\/435\/revisions"}],"up":[{"embeddable":true,"href":"https:\/\/sites.msudenver.edu\/haysc\/wp-json\/wp\/v2\/pages\/209"}],"wp:attachment":[{"href":"https:\/\/sites.msudenver.edu\/haysc\/wp-json\/wp\/v2\/media?parent=435"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}