1. Skin. The skin is the body’s largest organ, made of water, protein, fats, and minerals. Your skin protects your body from germs and regulates body temperature. Nerves in the skin help you feel sensations like hot and cold.
2. Hair. A component of the integumentary system that extends downward into the dermal layer where it sits in the hair follicle. The presence of hair is a primary differentiator of mammals as a unique class of organisms. In humans, it is a cherished and highly visible indicator of health, youth, and even class. It also has a sensory function, and acts to protect from cold and UV radiation.
3. Nail. The nail is a flexible plate of horny tissue, made up of keratin, i.e., epidermic cells formed in the root of the nail and hardened. The nail originates in the matrix as part of the epidermis, or outer layer of the skin. It hardens and thickens through a process called “keratinization”, becoming less firmly attached to the nail bed. As growth continues, the nail becomes thinner and again fixes itself firmly to the nail bed, taking on a pinkish tone.
1. Skin. The skin is the body’s largest organ, made of water, protein, fats, and minerals. Your skin protects your body from germs and regulates body temperature. Nerves in the skin help you feel sensations like hot and cold.
2. Hair. A component of the integumentary system that extends downward into the dermal layer where it sits in the hair follicle. The presence of hair is a primary differentiator of mammals as a unique class of organisms. In humans, it is a cherished and highly visible indicator of health, youth, and even class. It also has a sensory function, and acts to protect from cold and UV radiation.
3. Nail. The nail is a flexible plate of horny tissue, made up of keratin, i.e., epidermic cells formed in the root of the nail and hardened. The nail originates in the matrix as part of the epidermis, or outer layer of the skin. It hardens and thickens through a process called “keratinization”, becoming less firmly attached to the nail bed. As growth continues, the nail becomes thinner and again fixes itself firmly to the nail bed, taking on a pinkish tone.
SOURCES:
• https://www.physio-pedia.com/Integumentary_System
• https://my.clevelandclinic.org/health/articles/10978-skin
• https://mavala.com.au/mavacademy-anatomy-nails