Lab Male and Female Reproductive Flashcards
External organs of the male reproductive system:
Penis
Testes
Epididymi
Internal reproductive organs
Ductus deferens
Urethra
Ejaculatory duct
And 3 glands: bulbourethral, seminal vesicles, prostate gland
3 types of glands in the penis:
Prostate gland
Bulbourethral gland
Seminal vesicles
Describe the penis structure:
An elongated tubular structure, composed of the shaft, glans, urethra, erectile tissue and foreskin
The 3 parts of the penis are:
- main portion: elongated
- glans: distal enlarged end aka the head
- urethra: tube passing through, connecting at the bladder
Define erectile tissue.
Soft spongy tissue filled with spaces called sinuses.
•there are three sections around the urethra: 2 corpora canvernosa, 1 corpus spongiosum
Corpora cavernosa
Erectile tissue
•making up two large sections of the shaft
•located on the dorsal surface
•sinuses fill with blood during arousal, causing erection
Corpus spongiosum
- one small section surrounding the urethra
- forms the internal tissue of the glands
- found on ventral surface
Prepuce
Aka foreskin
•at birth the glans is covered with skin called prepuce
•removed by circumcision
Testes are located:
Lateral and posterior to the penis, within the scrotum.
Scrotum
Pouch structure composed of smooth muscle and skin
Tunica albuginea
Connective tissue sheath surrounding each testis
What makes up a testis?
Divided into small units called lobules
•inside lobules are seminiferous tubules and interstitial cells
Seminiferous tubules
Small coiled tubes
•located in the lobules of the testes
•sperm production occurs here
Interstitial cells
Small cells located between the seminiferous tubules
•aka leydig cells
•secretes testosterone
Epididymi
- each is attacked to a testis
- made if head, body and tail
- sperm storage and maturation happens here
- after leaving epididymis, sperm is capable of fertilizing and oocyte
Ductus epididymis
Long coiled tube stretching through the epididymi connecting to the ductus deferens
Ductus deferens
- connected to epididymi
- passes through the spermatic cord and enters body cavity
- connected to the ejaculation duct in the prostate
- acts as pathway and storage for sperm
Ampulla
- means widening
* enlarged end of ductus deferens
Ejaculatory ducts
- located in the prostate gland
- are two of them
- short tubes that connect each vas deferens with urethra
- allow sperm movement in the urethra
- collected secretions from prostate and seminal vesicles
Urethra
- smooth muscle
- originates in the urinary bladder, passes through the prostate then through the penis
- long tube containing smooth muscle in the wall
- urine and sperm pathway
Secretory glands
- are exocrine
- secrete fluids in tubes that transport the materials to a different site
- glands include: 2 seminal vesicles, 2 bulbourethral and prostate
Prostate gland
Largest gland
•urinary bladder
•ejaculatory ducts and urethra pass through this
2 seminal vesicles
2 glands located near the ampulla of the ductus deferens
•empty secretions to aid in sperm movement
2 Bulbourethral glands
2 smaller glands
•aka Cowper’s glands
Aid in sperm movement
Female internal reproductive organs include
Vagina, uterus, uterine tubes, ovaries
Female external reproductive organs include
Vaginal opening, clitoris, labia, mons pubis
The females reproductive duty includes:
•producing oocytes
•secretes hormones that aid in reproductive process
•maintain developing organism during pregnancy
- female physiology is more complex than male
Mons pubis
- covers lower pubic bones
- in lower pelvis
- mouth of fatty adipose tissue
- covered with skin and hair
- contains sweat and oil glands
- has some erectile tissue
Clitoris
- just below mons pubis
- anterior to vaginal and urethral opening
- made of erectile tissue
- fills with blood during sexual stimulation
- aids in intercourse
- contains nerve endings
Labia
•lower wall of perineum •protects inner organs from abrasion Made of two subdivisions: Labia majora: large outer folds Labia minora: small inner folds
Pudendal cleft
The space between the labia majora
Vestibule
Opening of the vagina
Perineum-female
- Lower floor of pelvic area in males and females
- composed of skeletal muscle and covered with skin
- contains openings to the reproductive system and digestive system
Urethra
Located between the urinary bladder and the outside wall of the perineum
•opening is anterior to the Vaginal canal
•contains smooth muscle
•carries urine from bladder to outside of body
Describe the internal vagina:
Elongated •tubular stricter with muscular walls •secrets lubricating fluids that aid in intercourse •receive sperm •allows release of uterine lining •birth canal
Uterus
- lower pelvic cavity
- thick muscular walls
- composed of three main structures
- composed of three main layers
The three sections of the uterine structure:
Fundus: top, uterine tubes attached here
Body: large mid section
Cervix: lowest section, elongated neck like structure connecting to vagina
Tissue layers of the uterus:
Endometrium- inner lining, sheds during menstruation, fetus is housed here during pregnancy
Myometrium- mid-outer thick muscle layer, smooth muscle
Perimetrium- outer layer, covering uterus
2 ovarian tubes
(Uterine tubes)
(Fallopian tubes)
- connected to the walls of the uterus at the fundus
* contact ovaries at the infundibulum just past the ampulla
Fimbria
- partially cover each ovary but aren’t attached
- lined with ciliated epifilia
- where egg and sperm meet in fertilization
Ovaries
- lateral to uterus
* secrete hormones estrogen and progesterone
What are ligaments composed of?
Peritoneal tissue
Broad ligaments (uterine attachment)
- attach uterus to lateral body walls
* provide blood vessels and nerve endings leading to uterus
Uterosacral ligaments (uterine attachment)
Attach the uterus to the sacrum of the vertebral column
Round ligaments (uterine attachment)
Extend from the upper uterus to the anterior wall of the abdominal cavity
Broad ligament (ovarian attachment)
Ovaries are attached to posterior surface
Ovarian ligaments
Anchor ovary to uterus
Suspensory ligaments (ovarian attachments)
Attach to lumbar area of the body wall
•carry blood vessels and nerves to each ovary