Information: - The dermis or corium is a layer of skin between the epidermis (with which it makes up the cutis) and subcutaneous tissues, that primarily consists of dense irregular connective tissue and cushions the body from stress and strain. It is divided into two layers, the superficial area adjacent to the epidermis called the papillary region and a deep thicker area known as the reticular dermis. The dermis is tightly connected to the epidermis through a basement membrane. Structural components of the dermis are collagen, elastic fibers, and extrafibrillar matrix. It also contains mechanoreceptors that provide the sense of touch and thermoreceptors that provide the sense of heat. In addition, hair follicles, sweat glands, sebaceous glands, apocrine glands, lymphatic vessels and blood vessels are present in the dermis. Those blood vessels provide nourishment and waste removal for both dermal and epidermal cells. - Vellus hair is short, thin, slight-colored, and barely noticeable thin hair that develops on most of a person's body during childhood. Exceptions include the lips, the back of the ear, the palm of the hand, the sole of the foot, some external genital areas, the navel, and scar tissue. The density of hair the number of hair follicles per area of skin varies from person to person. Each strand of vellus hair is usually less than 2 mm (1/13 inch) long and the follicle is not connected to a sebaceous gland. - A hair tie, also known by the names listed below, is an item used to fasten hair, particularly long hair, away from areas such as the face. This is usually done as part of a hairstyle such as pigtails, bunches, ponytail for straight, wavy and loosely curled hair and referred to as afro puffs, bunny tails and "pineapples" for highly curled and highly textured natural hair. Two common types of hair ties are the scrunchie and the hairpin. - Long hair is a hairstyle where the head hair is allowed to grow to considerable length. Exactly what constitutes long hair can change from culture to culture, or even within cultures. For example, a woman with chin-length hair in some cultures may be said to have short hair, while a man with the same length of hair in some of the same cultures would be said to have long hair. - H.O.R.S.E. is a form of poker commonly played at the high-stakes tables of casinos. It consists of rounds of play cycling among: - A scrunchie (or scrunchy) is a fabric-covered elastic hair tie used to fasten long hair. Large, elaborate styles and diminutive, unassuming forms are available in many different colors, fabrics, and designs. - Keratin is one of a family of fibrous structural proteins. Keratin is the protein that protects epithelial cells from damage or stress. It is the key structural material making up the outer layer of human skin. Keratin monomers assemble into bundles to form intermediate filaments, which are tough and form strong unmineralized epidermal appendages found in reptiles, birds, amphibians, and mammals. The only other biological matter known to approximate the toughness of keratinized tissue is chitin. - Poker is a family of gambling card games, but is often considered a skill based game. All poker variants involve betting as an intrinsic part of play, and determine the winner of each hand according to the combinations of players' cards, at least some of which remain hidden until the end of the hand. Poker games vary in the number of cards dealt, the number of shared or "community" cards, the number of cards that remain hidden, and the betting procedures. - Mammals are any vertebrates within the class Mammalia (from Latin "mamma" "breast"), a clade of endothermic amniotes distinguished from reptiles and birds by the possession of a neocortex (a region of the brain), hair, three middle ear bones and mammary glands. The sister group of mammals may be the extinct "Haldanodon." The mammals represent the only living Synapsida, which together with the Sauropsida form the Amniota clade. The mammals consist of the Yinotheria including monotrema and the Theriiformes including the theria. - The human body is the entire structure of a human being. It is composed of many different types of cells that together create tissues and subsequently organ systems. They ensure homeostasis and viability of human body. - Hair care is an overall term for hygiene and cosmetology involving the hair which grows from the human scalp, and to a lesser extent facial, pubic and other body hair. Hair care routines differ according to an individual's culture and the physical characteristics of one's hair. Hair may be colored, trimmed, shaved, plucked, or otherwise removed with treatments such as waxing, sugaring, and threading. Hair care services are offered in salons, barbershops, and day spas, and products are available commercially for home use. Laser hair removal and electrolysis are also available, though these are provided (in the US) by licensed professionals in medical offices or speciality spas. - In biology, a filament is a "long chain of proteins, such as those found in hair, muscle, or in flagella". They are often bundled together for strength and rigidity. Some cellular examples include: - A biomaterial is any substance that has been engineered to interact with biological systems for a medical purpose - either a therapeutic (treat, augment, repair or replace a tissue function of the body) or a diagnostic one. As a science, biomaterials is about fifty years old. The study of biomaterials is called biomaterials science or biomaterials engineering. It has experienced steady and strong growth over its history, with many companies investing large amounts of money into the development of new products. Biomaterials science encompasses elements of medicine, biology, chemistry, tissue engineering and materials science. - Hair is a protein filament that grows from follicles found in the dermis, or skin. Hair is one of the defining characteristics of mammals. The human body, apart from areas of glabrous skin, is covered in follicles which produce thick terminal and fine vellus hair. Most common interest in hair is focused on hair growth, hair types and hair care, but hair is also an important biomaterial primarily composed of protein, notably keratin. - A hairstyle, hairdo, or haircut refers to the styling of hair, usually on the human scalp. Sometimes, this could also mean an editing of beard hair. The fashioning of hair can be considered an aspect of personal grooming, fashion, and cosmetics, although practical, cultural, and popular considerations also influence some hairstyles. The oldest known depiction of hair braiding dates back about 30,000 years. In ancient civilizations, women's hair was often elaborately and carefully dressed in special ways. In Imperial Rome, women wore their hair in complicated styles. From the time of the Roman Empire until the Middle Ages, most women grew their hair as long as it would naturally grow. During the Roman Empire as well as in the 16th century in the western world, women began to wear their hair in extremely ornate styles. In the later half of the 15th century and on into the 16th century a very high hairline on the forehead was considered attractive. During the 15th and 16th centuries, European men wore their hair cropped no longer than shoulder-length. In the early 17th century male hairstyles grew longer, with waves or curls being considered desirable. - Bunches (also called twintails, angel wings, two ponytails, dog ears, or pigtails) are a hairstyle in which the hair is parted down the middle and gathered into two symmetrical bundles, like ponytails, secured near the scalp. In some English-speaking regions, this hairstyle is referred to as "pigtails," but in others, the term "pigtails" applies only if the hair is braided. - To make a ponytail , some , most or all of the hair on the head is pulled away from the face , gathered and secured at the back of the head with a hair tie , clip , or other similar device and allowed to hang freely from that point . It gets its name from its resemblance to the undocked tail of a horse or pony . Ponytails are most commonly gathered at the middle of the back of the head , or the base of the neck . Depending on fashions , they may also be worn at the side of the head ( which is sometimes considered formal ) which is worn over one ear , or on the very top of the head ( allowing the hair to fall down the back or one side of the head ) . If the hair is divided so that it hangs in two sections they are called '' ponytails '' , bunches , or pigtails if left loose , and pigtails or braids if plaited . Unbraided ponytails worn above each ear are sometimes called dog - ears . It is common for those who wear tight ponytails to experience traction alopecia , a form of hair loss . Sometimes it can cause a headache . After reading the paragraphs above, we are interested in knowing the entity with which 'ponytail' exhibits the relationship of 'subclass of'. Find the answer from the choices below. Choices: - angel - aspect - basement - beard - being - biology - brain - class - community - connective tissue - culture - cycling - density - device - dog - fashion - function - gland - group - growth - hair - hairstyle - heat - history - horse - human - hygiene - keratin - laser - latin - long hair - male - materials science - matrix - matter - membrane - muscle - name - natural - number - organ - person - point - poker - protein - sauropsida - sense - skin - strain - stress - study - term - tissue - top - western
A:
long hair