Which layer is composed of epidermis and dermis and measures 2-3 mm in thickness?

Which layer is composed of epidermis and dermis and measures 2-3 mm in thickness?

• A. Skin
• B. Subcutaneous layer
• C. Mammary zone
• D. Retromammary space

Answer: (A)

The outer covering of the body is the skin, which is made up of two layers: the epidermis on the surface and the dermis beneath it. Together, they form the skin and typically measure about 2–3 millimeters in thickness, though thickness varies by location. In ultrasound imaging, the skin appears as a bright, superficial line at the very top, with the deeper subcutaneous tissue beneath it. The subcutaneous layer is not part of the epidermis/dermis; it’s mainly fat and connective tissue. The mammary zone and the retromammary space refer to breast anatomy, not the epidermis/dermis combination.

The outer covering of the body is the skin, which is made up of two layers: the epidermis on the surface and the dermis beneath it. Together, they form the skin and typically measure about 2–3 millimeters in thickness, though thickness varies by location. In ultrasound imaging, the skin appears as a bright, superficial line at the very top, with the deeper subcutaneous tissue beneath it. The subcutaneous layer is not part of the epidermis/dermis; it’s mainly fat and connective tissue. The mammary zone and the retromammary space refer to breast anatomy, not the epidermis/dermis combination.