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From superficial to deep, what is the correct order of structures that would be encountered if a needle was inserted into a testis?

A.

Tunica vaginalis, tunica albuginea, seminiferous tubules

B.

Tunica vaginalis, seminiferous tubules, tunica albuginea

C.

Tunica albuginea, tunica vaginalis, seminiferous tubules

D.

Seminiferous tubules, tunica vaginalis, tunica albuginea

Answer and Explanation

The Correct Answer is A

A. Tunica vaginalis, tunica albuginea, seminiferous tubules: The tunica vaginalis is the outer protective layer, followed by the tunica albuginea (a tough fibrous layer), and then the seminiferous tubules, where sperm production occurs.

B. Tunica vaginalis, seminiferous tubules, tunica albuginea: The seminiferous tubules are deeper than the tunica albuginea, making this order incorrect.

C. Tunica albuginea, tunica vaginalis, seminiferous tubules: This reverses the outer layers, as the tunica vaginalis is superficial to the tunica albuginea.

D. Seminiferous tubules, tunica vaginalis, tunica albuginea: This order is incorrect, as the tunica vaginalis and tunica albuginea are external to the seminiferous tubules.


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Related Questions

Correct Answer is B

Explanation

A. The testes would not maintain the proper temperature: Temperature regulation of the testes is controlled by the scrotum and muscles, not the prostate.

B. The flow of urine may be blocked or slowed: Benign prostatic hyperplasia (BPH), or an enlarged prostate, can compress the urethra, leading to difficulty urinating or weak urine flow.

C. Seminal fluid would not have the proper pH: The prostate contributes fluids to semen, but BPH typically affects urine flow more than seminal fluid pH.

D. Sperm would not be allowed to fully mature: Sperm maturation occurs in the epididymis, not in the prostate.

Correct Answer is C, A, D, B

Explanation

  • Deoxygenated blood from the body enters the right atrium, passes through the tricuspid valve into the right ventricle.
  • From the right ventricle, blood moves through the pulmonary valve into the pulmonary arteries and goes to the lungs for oxygenation.
  • Oxygenated blood returns to the left atrium and passes through the bicuspid (mitral) valve into the left ventricle.
  • Finally, the left ventricle pumps oxygenated blood through the aortic valve into the aorta for distribution to the body.

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