Dental pulp at the centre of the tooth- highly vascularized with nerves and cells, containing type 1 collagen
The hippo tooth has a strong compressive modulus. The dentine within the tooth is demonstrated to have an effective crack arrest.
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…
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,…
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.
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…
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…
Nail & Health Disorders
The word onychorrhexis originates from the Greek words onycho: meaning nail, and
rhexis: meaning bursting.
Onychorrhexis is another term for Brittle Nails. This is a breakage causing
“longitudinal ridging” that could be a result of a number of things including:
Excessive amounts of strong soap and water exposure, anemia, anorexia, nail polish
remover, nail polish remover etc. It is also a result of aging.
A Brief Summary on Psoriasis
Our skin is the largest organ of our body; it’s the entire human body outer cover and gives the body form and shape. It’s also separates the external parts of the body from the internal parts. Our skin protects our body against the light, heat, germs, cold temperatures, and injury. It’s protecting the body from chemical and mechanical substances. The skin is also the body immune system surveillance. The body produces tan of cells every day to replenish the dead…
Final Journal Assignment
During the shadowing internship, there were plenty of opportunities to witness interesting cases that helped me to understand the field of dermatology. The first case I saw while shadowing was of a patient who presented with Proximal subungual onychomycosis under her toenails.
Patient History/Present Illness: This patient, a middle aged women, presented with persistent, fungus under her toes. She…
The skin is largest organ in the human body, where it covers every square inch of our bodies, for it protects us from outside pathogens, but sometimes these pathogens can hurt our skin. Vitiligo is a skin disease that affects all people of all skin types, there is no specific gender or race that gets affected. Vitiligo is actually a common disease where it affects 1-2% of the world population.
Vitiligo is a skin disease that results in the loss of skin color in blotches on the body. This…