The penis becomes erect because:
Correct answer: A. Spongy tissues inside it fills with blood
- A. Spongy tissues inside it fills with blood
- B. There is a hinge joint between the pelvic bone and the penile bone
- C. It fills with urine or sperm
- D. None of the above
Explanation
Spongy tissues inside it fills with blood: This is the correct explanation. The penis contains two cylinder-shaped chambers called the corpora cavernosa, which are made up of spongy tissue. When a man becomes sexually aroused, blood flow to these chambers increases, causing them to fill with blood and expand, resulting in an erection.
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