Keratin

Nano-crystalline) Dental pulp at the centre of the tooth- highly vascularized with nerves and cells, containing type 1 collagen Hippo Tooth The hippo tooth has a strong compressive modulus. The dentine within the tooth is demonstrated to have an effective crack arrest. Warthog Tusk Warthog tusks have dentil tubules that extend from enamel and dentil. They have excellent tensile strength in the longitudinal direction. Toucan and Horned Billed Beaks Toucan and Horned Billed beaks have an ingenious sandwich structure. They are light weight, containing an internal foam core made from bone. It is an extension of the bird skull, and is also hollow within the middle. The toucan bill is made of multiple layers of keratin tiles. The mechanical properties of the keratin are based on the high moisture content. It has very high tensile strength, but tends to decrease in strength as humidity increases. This therefore reduces its mechanical properties at high temperatures. The toucan hornbill contains a cell foam, that contributes to the stiffness of the structure. Sponges and Spicules Sponges and Spicules are known for their outside flexibility and toughness, as well as their multi function as a light weight material. They are found at the base of the silica basket. They are often subject to mechanical stresses at the sea floor, therefore they are mechanically strong. The onion like layered shape of the sponge, helps arrests the cracks as well as increases its flexural strength.…

Integumentary System: Anatomy and Physiology of the Skin The skin covers the entire body surface, making up most of a humans body weight. Skin tissue provides the human body with protection from mechanical, chemical, thermal damage, and bacteria. Along with this, the skin provides insulation while regulating heat and cushioning for tissues and organs. This body system also helps with the prevention of water loss, but also allows excretion of things such as urea, salts, and water. The skin has…

You are either born with naturally curly hair, or straight hair (or wavy). The amount of curl, wave, or lack thereof is dependent on the number of disulfide bonds between hair proteins found in the hair shaft; the greater number of links, the curlier the hair, and the fewer the number of links the straighter the hair. Hair is primarily composed of keratin, a protein which grows from the follicle . Keratins, and other proteins are formulated in the cells of the hair follicle . All of the proteins…

its constitution. This is done by cells moving from the inner side to the outer side. Such reaction is due to cell polarisation. When moving towards outer layers, keratin maturation occurs and four layers of cells of different maturation stages form. In stratum corneum (the outer layer) cells become squamous, have no nuclei and form many layers that overlap and are crosslinked forming a lipid-protein matrix, which acts as a protective barrier and is hard to penetrate. These cells are cornified…

beauty supply stores can put ideas into women’s minds making them believe that something is “good” for their hair or “harmless” to them. Some may even know that something is bad however, since they are not aware of the effects they simply don’t care. Here is the truth about some of the things you may be doing wrong with your hair. Now, what are some things that are harmful to hair? There are many things including: coloring, bleaching, blow drying, straightening,over shampooing,over brushing,…

Fingernails are capable of showing sicknesses or diseases that are happening inside the human body. The plate of the nail is made of a protein named “keratin” which is transparent and flexible but durable enough to retain a shape and protect the nail bed. Underneath the nail plate is the nail bed which is composed of two parts, the dermis and the epidermis. The purpose of the nail bed is to house the nail matrix, which grows the nail and stabilize the nail’s foundation. The nail plate and nail…

Introduction Dyshidrotic eczema (pompholyx) is a type of eczema that causes very itchy (pruritic), fluid-filled blisters (vesicles) to form on the hands and feet. It can affect people of any age, but is more common before age 40. There is no cure, but treatment and certain lifestyle changes can help relieve symptoms. What are the causes? The cause of this condition is not known. What increases the risk? You are more likely to develop this condition if: You are older than 40. You are female. What…

What Is toenail fungus? Toenail fungus is an infection that gets in through cracks in your nail or cuts in your skin and can make your toenail change color or get thicker. While it may not seem as menacing as an ingrown toenail which pierces the soft skin of the toe, toenail fungus can also hurt. Because toes are often warm and damp, different kinds of fungi and yeast affect different parts of the nail, causing discomfort. Left untreated, an infection could spread to other toenails, skin, or…

otherwise known as heat. The nails on our fingers and toes are made from keratin and give the nail a hard covering to protect our fingers and toes from damage. Exocrine glands are important because it is how the body lets us sweat. Glands secrete products that the…

Type 4c hair is the most tightly coiled of all hair types. The tightness of the coils means that 4c hair has a tremendous about of shrinkage. It is quite common for most naturals with type 4c hair to experience extreme shrinkage (70% or more), causing it to appear much shorter than it actually is. When 4c hair is in its natural state i.e. freshly washed and without product, a defined curl is not evident. The tightness of 4c coils also means that naturals with this hair type, typically have very…