The layer of the skin that contains blood vessels is the
dermis
subcutaneous layer
Epidermis
Hypodermis
The Correct Answer is A
Rationale:
A. The dermis lies beneath the epidermis and contains blood vessels, lymphatic vessels, nerves, sweat glands, sebaceous glands, and hair follicles. The blood vessels in the dermis play a key role in regulating body temperature and nourishing both the dermis itself and the avascular epidermis above it.
B. Also called the hypodermis, this layer lies below the dermis and is composed mainly of fat and connective tissue. While it provides insulation, cushioning, and energy storage, the question specifically asks for the skin layer containing blood vessels, which is the dermis.
C. The epidermis is the outermost skin layer. It is avascular, meaning it contains no blood vessels. It relies on diffusion from the dermis for nutrient and waste exchange.
D. Another name for the subcutaneous layer. Although it contains larger blood vessels that supply the dermis, it is technically not considered part of the skin itself.
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Related Questions
Correct Answer is C
Explanation
Rationale:
A. Cranial and Caudal refers to directional terms in anatomy (head and tail ends), not divisions of the skeleton.
B. Left and Right simply describe sides of the body and do not represent structural divisions of the skeletal system.
C. The axial skeleton includes the skull, vertebral column, and thoracic cage (ribs and sternum) and serves primarily to protect vital organs and provide structural support. The appendicular skeleton includes the upper and lower limbs, shoulder girdle, and pelvic girdle, which facilitate movement and interaction with the environment. These two divisions together provide a framework for the body, support posture, and enable locomotion.
D. Upper and lower are general terms for parts of the body and do not accurately describe the anatomical divisions of the skeleton.
Correct Answer is A
Explanation
Rationale:
A. Cyanosis refers to a bluish discoloration of the skin, lips, or nail beds due to inadequate oxygenation of the blood or poor circulation. It is often seen in conditions such as respiratory distress, heart disease, or hypothermia.
B. Refers to redness of the skin, usually caused by increased blood flow to the capillaries in response to fever, inflammation, infection, or sunburn.
C. Pallor refers to paleness of the skin, often due to reduced blood flow, anemia, shock, or hypothermia.
D. Jaundice refers to a yellow discoloration of the skin and eyes caused by elevated bilirubin levels, often due to liver dysfunction or bile duct obstruction.
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