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 [tes´tēz] (L.)
plural of testis.


Plural of testis.


/tes·tes/ (tes´tēz) [L.] plural of testis.


Plural of testis.


the two male gonads that produce sperm and testosterone.


Plural of testis.


(tes'tis) plural.testes [L.]
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The male gonad; testicle. It is one of two reproductive glands located in the scrotum that produce the male reproductive cells (spermatozoa) and the male hormones testosterone and inhibin. See: illustration


Each is an ovoid body about 4 cm long and 2 to 2.5 cm in width and thickness, enclosed within a dense inelastic fibrous tunica albuginea. The testis is divided into numerous lobules separated by septa, each lobule containing one to three seminiferous tubules within which the spermatozoa are produced by meiosis. The lobules lead to straight ducts that join a plexus, the rete testis, from which 15 to 20 efferent ducts lead to the epididymis. The epididymis leads to the ductus deferens, through which sperm are conveyed to the urethra. Between the seminiferous tubules are the interstitial cells (cells of Leydig), which secrete testosterone. Within the tubules are sustentacular cells, which secrete inhibin. The testes are suspended from the body by the spermatic cord, a structure that extends from the inguinal ring to the testis and contains the ductus deferens, testicular vessels (spermatic artery, vein, lymph vessels), and nerves.


Hyperfunction (hypergonadism) may cause early maturity such as large sexual organs with early functional activity and increased growth of hair. Hypofunction (hypogonadism) is indicated by undeveloped testes, absence of body hair, high-pitched voice, sterility, smooth skin, loss of sexual desire, low metabolism, and eunuchoid or eunuch body type.

descent of testis

The migration of the testis from the abdominal cavity to the scrotum during fetal development.

displaced testis

A testis located abnormally within the inguinal canal or pelvis.

femoral testis

An inguinal testis near or superior to the femoral ring.

inverted testis

A testis reversed in the scrotum so that the epididymis attaches to the anterior instead of the posterior part of the gland.

perineal testis

A testis located in the perineal region outside the scrotum.

undescended testis



The pair of male reproductive glands enclosed in the scrotum that produce the male sex hormone testosterone and the spermatozoa. The singular form is testis.


[L.] plural of testis.

Patient discussion about testes

Q. What is A1C test? My Dr. said I should take it every 4 months or so to see if I kept my diet. what is it exactly..?

A. here’s some on-line info about it:

Q. How do you test for ADHD? Is it a physical test or a psychological test? Or a combination of both?

A. i found a video on youtube about diagnosing AD/HD-

and here is an article about it-

hope it's what you are looking for.

Q. Are there any lab tests used. Are there any lab tests that can be used to diagnose fibromyalgia disease?

A. Yes Liam, there are lots of lab tests to diagnose (or better understand fibromyalgia) but are only used in the research setting. Using them in the clinical setting doesn't help the patient because it doesn't help the problem of not having effective treatments. Many researchers are working on a simple lab test for the office.

More discussions about testes
References in periodicals archive ?
Seasonal variations in histomorphology of testes and bursa, immune parameters and serum testosterone concentration in male guinea fowl (Numida meleagris).
5 Testes are paired male reproductive organ in scrotal sac for production of spermatozoa, histologically consist of seminiferous tubules and interstitial spaces having leydig cells.
Table-I: Statistical analysis of preoperative, early postoperative and late postoperative testicular volumes compared with contralateral testes.
5 Amara observed decrease in weights of testes and seminal vesicle of rats treated with Cadmium which is associated with elevated lipid per oxidation in different organs including kidney, liver and testes.
Nonpalpable testes in young boys: evaluation with MR imaging.
Vitelline bands well developed with prominent follicles, extra-caecal may overlapping caeca, commencing at the level of the middle of the testes and extending up to fourth quarter of the body; post Vitelline space is 0.
Other procedures done for impalpable testes are Prentiss maneuver and micro vascular surgery.
The majority of patients with SNT have triorchidism with two testes in the scrotal sac [5].
Removing the testes before puberty improved these symptoms by leaving more selenium for the brain.
Foram digitalizados em uma planilha do Excel os dados relacionados ao titulo do estudo, periodico, ano de publicacao, faixa etaria, caracterizacao dos grupos estudados e testes aplicados.