**Question:** Ovary consists of all except:

A. Testis
B. Seminal vesicle
C. Prostate gland
D. Penis

**Core Concept:**
The ovary is an essential reproductive organ in females, responsible for the production of oestrogen and progesterone hormones, as well as the formation of mature ova (eggs) during the menstrual cycle. The male reproductive system consists of the testes, seminal vesicles, prostate gland, and penis, which are involved in sperm production, semen formation, and male hormonal regulation, respectively.

**Why the Correct Answer is Right:**
The correct answer, "D. Penis," is excluded from the ovary because the penis is the male reproductive organ responsible for erection, ejaculation, and the delivery of semen during sexual intercourse. Since it is involved in male reproductive functions, it is not relevant to the female reproductive system, which is the focus of the question.

**Why Each Wrong Option is Incorrect:**
A. Testis (Option A) is a part of the male reproductive system, responsible for producing sperm and hormones like testosterone. It is not present in the female reproductive system.
B. Seminal vesicle (Option B) is a component of the male reproductive system, where it secretes fluid rich in fructose to nourish sperm and provide a protective environment for them. It is not part of the female reproductive system.
C. Prostate gland (Option C) is a male accessory gland involved in producing seminal fluid rich in enzymes and electrolytes, providing nourishment and neutral pH for sperm. It is not part of the female reproductive system.

**Clinical Pearl:**
Understanding the differences between the male and female reproductive systems is crucial for practicing physicians, as it helps in accurate diagnosis, treatment planning, and patient education. Adequate knowledge of both systems ensures appropriate management of conditions like infertility, hormonal imbalances, and menstrual disorders, which can affect both sexes.