Chapter 27 Flashcards
Is a milky white, somewhat sticky mixture of sperm, testicular fluid, and accessory gland secretions.
Semen
Are pea-sized glands located inferior to the prostate in the urogenital diaphragm?
Bulbourethral glands
The normal chromosome number in most body cell is the ___ ___ __ of the organism, symbolized as 2n.
Diploid chromosomal number
___ is the sequence of events in the seminiferous tubules of the testes that produces male gametes.
Spermatogenesis
The diploid chromosomal number is _
46
Diploid cells contains 23 pairs of similar chromosomes called
Homologous chromosomes
The number of chromosomes in human gametes is ____ referred to as the _____ _____ _____ or n.
23
Haploid chromosomal number
What is the copulatory organ designed to deliver sperm into the female reproductive tract called?
Penis
Gamete formation in both sexes involves _____ a unique kind of nuclear division that for most part occurs only in the gonads.
Meiosis
Enlargement and stiffening of the penis, results from engorgement of the erectile bodies with blood? (Parasympathetic control)
Erection
Is the propulsion of semen from the male duct system. (Sympathetic control)
Ejaculation
Is a single doughnut shaped gland about the size of a peach pit?
Prostate
_____ Is the terminal portion of the male duct system. It conveys both urine and semen.
Urethra
The cup shaped _____, head contains the efferent ductules caps the superior aspect of the testis.
Epididymis
Runs upward as part of the spermatic cord from the epididymis through the inguinal canal into the pelvic cavity.
Ductus deferens or vas deferens
Lie on the posterior bladder surface? (70% of the volume of semen)
Seminal glands
________ contains mitochondria spiral tightly around the microtubules of the tail?
Midpiece
_____ _____ include the paired seminal glands, and bulbourethral glands, and the single prostate.
Accessory glands
Extends from the basil lamina to their tight junctions and contains spermatogonia and the earliest primary spermatocytes?
Basal compartment
Make up most of the penis and are bound by the fibrous tunica albuginea. Their proximal end form the crura of the penis. (Paired dorsal erectile bodies)
Corpora cavernosa
The tight junctions between the sustenocytes form the what?
Blood testis barrier
The skin covering the penis is loose and when it slides distally if forms a cuff called??
Prepuce or foreskin
A layer of smooth muscle in the superficial fascia, wrinkled the scrotal skin?
Dartos muscle
________ suspends the scrotum and contains the root of the penis and the anus “it is the diamond shaped region located between the public symphysis anteriorly”
Perineum
Bands of skeletal muscle that arise from the internal oblique muscles of the trunk, elevate the testes?
Cremaster muscles
The sperm producing _____ lie within the scrotum.
Testes (male gonads)
A sac of skin and superficial fascia that hangs outside the abdominopelvic cavity at the root of the penis.
Scrotum
__ __ are steroid hormones secreted by gametes.
Sex hormones
Are the tested in male and ovaries in females.
Gonads
Ducts, glands, and external genitalia are the?
Accessory reproductive organs
Lying in the soft connective tissue surrounding the seminiferous tubules are the? (Produce androgens)
Interstitial endocrine cells (leydig cells)
Sperm can be produced at ___ than the body temperature.
3degrees C
The __ __ derived from the peritoneum and surrounds each of the testes.
Tunica vaginalis
Septa divide the testis into a 250-300 lobules, each containing 1-4 __ __
Seminiferous tubules
The epithelium consist of sphenoid __ __. (Sperm forming)
Spermatogenic cells
The surgical removal of the prepuce is ___
Circumcision
Encloses nerve fibers blood vessels and lymphatics that supply the testis
Spermatic cord
Blood supply comes from testicular _____ & _____
Arteries
Veins
Sperm are delivered to the exterior through a system of _____
Ducts
Enzymes that allow sperm to penetrate the egg are located in the ______ of the sperm cell
Acrosome
The testicular cells that construct the blood testis barriers are the?
Sustenocytes
The release of ______ encourages interstitial endocrine to release _____
Lh
Testosterone
Which is housed within the spermatic cord?
Testicular artery and veins
At what point During meiosis do homologous chromosomes pair up?
Prophase 1
Sperm is produced in the ______ __ of the testes
Seminiferous tubules
