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Male Anatomy Study Guide

Histology

Male Anatomy Lab Assignment

Male Reproductive System

Anatomy & Histology

Male anatomy

 

I). Sperm travel:

Testes

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Epididymis

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Ductus deferens

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Urethra

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Penis

 

A). Sac outside of abdominal cavity.

B). Function:

Contains & protects the paired testes.

The scrotum protects the sperm from over heating and responds to changes in temperature

 

scrotum
C). Spermatic Cord:

 It extends from the abdomen to the testes.

The spermatic cord is responsible for extending and withdrawing the scrotum

    Sensory nerve fibers located in the spermatic cord transmit pain impulses.

III). Testes (single testis)

A). Function:

B). Divided into 200-300 wedge shaped lobules.

    Testes and ovaries are from the same tissue

C). Seminiferous tubules:

Cells specialties

1). Interstitial cells or  Leydig cells

2). Spermatogenic cells (developing spermatogonia)

 

Testis
HISTOLOGY (always draw tissues not full organs)

Label

  • Seminiferous tubule
  • sperm cells (inside the tube)
  • spermatognia (lining the tube)
  • interstitial cells
Seminiferous Tubule
V). Duct System

A). The seminiferous tubules converge

Seminiferous tubules

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tubulus rectus

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rete testis

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efferent ductules

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epididymis

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ductus deferns

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ejaculatory duct

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urethra

male duct system
epididymis compared t seminferous tubules epididymis compared to semiferus tubules

http://employee.lsc.edu/faculty/BrianBich/Picture%20Library/Forms/DispForm.

B). Epididymis

During ejaculation the smooth muscle wall of the epididymis contract expelling sperm into the ductus deferens

HISTOLOGY

Label

  • epididymis
  • sperm cells (inside the tube)
  • interstitial cells
Epididymis
C). Ductus Deferens or Vas Deferens
  • Runs from the epididymis into the pelvic cavity and loops over the ureter.
  • Joins with seminal vesicle to form ejaculatory duct.
  •  Ductus Deferens propels sperm into the urethra.

 

ductus deferns
D). Urethra

regions

1). Prostatic urethra

2). Membranous urethra

3). Spongy urethra

V). Penis

A). Function:

B). Structure: external

  • Root
  • Shaft
  • Glans penis
external urethral opening
prepuce or foreskin
C). Structure: internal

1). Spongy urethra

2). Erectile tissue:

a). Corpus spongiosum forms the bulb of the penis and the glans.

b). Corpus cavernosa paired erectile tissue.

*tunica albuginea is the surrounding connective tissue.

 

penile cross section
D). Histology

LABEL

  • corpus cavernosa
  • corpus spongiosum
  • urethra

 

Penis
 
http://biology.clc.uc.edu/fankhauser/Labs/Anatomy_&_Physiology/A&P203/Reproductive_Tract_Histology/
IV). Accessory Glands

A). Seminal Vesicles:

Found:

Function:

(Male urethra & Female reproductive tract are acidic—prevents infection)

Joins ductus deferens where sperm and seminal fluid mix in the ejaculatory duct.

ductus deferns
B). Prostate Gland

Found:

Function:

Joins at the prostatic urethra

C). Bulbourethral Glands (Cowper’s Glands)

Found:

Function:

 

Sperm Sperm
http://weboflife.nasa.gov/currentResearch/currentResearchBiology http://www.syndel.com/spawning/sex_on_the_farm_37.html
D). Sperm
  LABEL
head
tail
midpiece