**Question:** All are true about mammary gland, except -

A. Mammary glands are part of the endocrine system
B. Mammary glands secrete digestive enzymes
C. Mammary glands are present in males as well as females
D. Mammary glands are responsible for producing bones

**Core Concept:** Mammary glands are part of the female reproductive system and are responsible for producing milk for lactation. They are paired glands located in the axilla (axillary mammary glands) and in the breast tissue (mammary ducts).

**Why the Correct Answer is Right:**

The correct answer, option D, states that mammary glands produce bones. This is incorrect because mammary glands are actually part of the female reproductive system and are responsible for producing milk for lactation. They are derived from the Mammary bud which is a branch of the lateral plate mesoderm during embryonic development.

**Why Each Wrong Option is Incorrect:**

A. Mammary glands are part of the endocrine system (True); however, they are specifically part of the female reproductive system and produce milk for lactation, not hormones.

B. Mammary glands secrete digestive enzymes (False); they secrete milk which contains proteins, lipids, carbohydrates, and minerals, but not digestive enzymes.

C. Mammary glands are present in males as well as females (False); mammary glands are exclusively found in females and do not develop in males. In males, the male equivalent is the **accessory sex glands**, which include the prostate, seminal vesicles, and bulbourethral glands.

**Clinical Pearl:**

Understanding the anatomy and function of mammary glands is crucial for medical students, especially in clinical scenarios. For example, in breast lumps or abnormalities, a thorough knowledge of mammary gland anatomy can aid in distinguishing between benign and malignant lesions. Additionally, understanding the hormonal regulation of lactation can help diagnose and treat disorders like galactorrhea (excessive milk production) and amenorrhea (absent menstrual periods).

**Correct Answer Explanation:**

**Correct Answer: C.**

Mammary glands are present in females and males, but their function and location are different. In females, mammary glands are responsible for lactation and are located in the breast tissue. In males, the accessory sex glands (prostate, seminal vesicles, and bulbourethral glands) secrete seminal fluid, which is different from milk production. These glands are located in the prostate gland, seminal vesicles, and bulbourethral glands, respectively, and are part of the male reproductive system.

**Why Each Wrong Option is Incorrect:**

A. Mammary glands are part of the endocrine system (True), but Option A is incorrect because they are part of the female reproductive system, not the endocrine system. The endocrine system includes glands that secrete hormones, such as the pituitary, thyroid,