Let’s carry on! Today we will revise dermis!
📌The dermis is the second layer of the skin, situated beneath the epidermis. It is a connective tissue layer that plays a crucial role in supporting and nourishing the epidermis. The dermis is composed of two main regions:
⚡️Papillary Dermis: This is the superficial layer of the dermis, directly beneath the epidermis. It contains dermal papillae, small projections that interlock with the epidermal ridges, forming the fingerprints. The papillary dermis is rich in blood vessels, aiding in nutrient exchange and temperature regulation.
⚡️Reticular Dermis: Deeper and thicker than the papillary dermis, the reticular dermis provides strength and elasticity to the skin. It contains collagen and elastic fibers, which contribute to the skin's structural integrity. Additionally, the reticular dermis houses various structures, including sweat glands, hair follicles, sebaceous glands, nerves, and blood vessels.
Functions of the dermis:
• Structural Support: Provides strength and elasticity to the skin.
• Nutrient Supply: Nourishes the epidermis through blood vessels, supporting cell growth and repair.
• Temperature Regulation: Blood vessels in the dermis can dilate or constrict to control heat loss or retention.
• Sensory Perception: Rich nerve supply allows for the perception of touch, pressure, pain, and temperature.
📎 source: Rook's Textbook of Dermatology, 4 Volume Set, 9th Edition
📌The dermis is the second layer of the skin, situated beneath the epidermis. It is a connective tissue layer that plays a crucial role in supporting and nourishing the epidermis. The dermis is composed of two main regions:
⚡️Papillary Dermis: This is the superficial layer of the dermis, directly beneath the epidermis. It contains dermal papillae, small projections that interlock with the epidermal ridges, forming the fingerprints. The papillary dermis is rich in blood vessels, aiding in nutrient exchange and temperature regulation.
⚡️Reticular Dermis: Deeper and thicker than the papillary dermis, the reticular dermis provides strength and elasticity to the skin. It contains collagen and elastic fibers, which contribute to the skin's structural integrity. Additionally, the reticular dermis houses various structures, including sweat glands, hair follicles, sebaceous glands, nerves, and blood vessels.
Functions of the dermis:
• Structural Support: Provides strength and elasticity to the skin.
• Nutrient Supply: Nourishes the epidermis through blood vessels, supporting cell growth and repair.
• Temperature Regulation: Blood vessels in the dermis can dilate or constrict to control heat loss or retention.
• Sensory Perception: Rich nerve supply allows for the perception of touch, pressure, pain, and temperature.
📎 source: Rook's Textbook of Dermatology, 4 Volume Set, 9th Edition