Histo-Male Repro Flashcards
What are the primary sex organs?
Testes and ovary
Gonads produce _______ and secrete _________
Gametes
Hormones
During what week of development does the gonads appear as a pair of longitudinal ridges?
5th week
Gonads appear as longitudinal ridges formed from proliferation of ____________ and condensation of underlying mesenchyme, the __________.
Coelomic epithelium
Genital/gonadal ridge
During what week does the primordial germ cells from yolk sac endoderm, invade the genital ridge?
6th week
The primitive sex cords are impossible to differentiate in both male and female embryoes.
Indifferent gonads.
The gonadal sex is determined by the testis determining factor on the _________.
Y chromosome
In a genetically male embryo, the primitive sex cords proliferate to form the _________ or ________.
Testes or medullary cord
During development the testis cords lose contact with surface epithelium and will be covered by __________.
Tunica albuginea
The testis cords are composed of ___________ and ________.
Primitive germ cells
Sertoli cells
The leydig cell is derived from
Mesenchyme of gonadal ridge
At what week of development dies the leydig cells start to secrete testosterone?
8th week
What hormone induces masculine differentiation of the mesonephric ducts and external genitalia?
Testosterone
The sertoli cells secrete what hormone?
Mullerian inhibiting substance
The hormone secreted by sertoli cells inhibit the development of _______
Paramesonephric ducts
At 7th month, the testes descend at what position?
Behind the abdominal position
From 7 months until birth there is progressive shortening of _________ making the testis inside the scrotal sac at birth.
Gubarnaculum testis
Capsule that surrounds each testis
Tunica albuginea
Fibrous Extensions of the capsule that divide the testis into lobules
Septa ( septuli testis)
Each lobule of the testis containd how many seminiferous tubules?
1-4 ST
Tightly coiled structures that function as sperm forming factories
Seminiferous tubules
These cells found in the testis produce androgens like testosterone.
Interstitial cells of leydig
What type of gland is the testis?
Compound tubular glands
A pendulous bag of skin with an incomplete layer of dartos muscle.
Scrotum
The testis should be maintained at temperatures lower that of body temperature because of…
Spermatogenesis
The testes develop _________within th abdominal cavity
Retroperitonially
The connection between the processus vaginalis and the peritonial cavity will develop into what layer of the testis?
Tunica vaginalis
What aspects of the testes are coated with mesothelium that was once continuous with the peritonial cavity mesothelium.
Anterior and lateral
What is the innermost layer of thetesticular capsule?
Tunica vasculosa
This layer of the capsule contains network of blood vessels
Tunica vasculosa
Seminiferous tubules are ______ cm long and ____ micrometer wide.
60cm
200microm