147 results found

Search Results for: hair

Blood Vessels Hold Key To Thicker Hair Growth

MGH researchers have succeeded in growing hair faster and thicker in mice, thanks to a protein that promotes blood vessel... Read More

Terminal hair

Definition noun The mature type of hair characterized by being pigmented, thicker, and with a larger diameter than the... Read More

Vellus hair

Definition noun Very fine, non-pigmented hair that covers most of the body of human and other mammals Supplement The vellus... Read More

Hair

Hair 1. The collection or mass of filaments growing from the skin of an animal, and forming a covering for a part of the... Read More

Lanugo

What is Lanugo? Lanugo is the delicate and downy hair that covers a fetus within the uterus (womb). It is very fine hair.... Read More

Phenotypic ratio

Phenotypic Ratio Definition How would one define phenotypic ratio? The correlation between the amount of offspring that... Read More

Family traits

When one thinks of family, they often think of persons who are blood-related to each other as parents to their children and... Read More

Hair root

Hair root The part of a hair that is embedded in the hair follicle, its lower succulent extremity capping the dermal papilla... Read More

Hair shaft

Hair shaft The non-growing portion of a hair which protrudes from the skin, i.e., from the follicle. Synonym: scapus... Read More

Exogen

Definition noun (physiology) The phase of the hair cycle in which the hair is shed (botany) Any of the plants characterised... Read More

Hypertrichosis

Definition noun, plural: hypertrichoses An atypical hair growth in excess over the body Supplement Trichosis is an archaic... Read More

Root Hair

Thin hairlike outgrowth of an epidermal cell just behind the tip; absorbs nutrients from the soil.Hair like structures found... Read More

Trichome

Definition noun, plural: trichomes (botany) An outgrowth (hair-like or scale-like) from the epidermal cell (microbiology) A... Read More

Sensory Systems

A sensory system is a part of the nervous system consisting of sensory receptors that receive stimuli from the internal and... Read More

Independent Assortment and Crossing Over

Reviewed by: Mary Anne Clark, Ph.D. The previous tutorial investigates the process of meiosis, where... Read More

Erector muscles of hairs

Erector muscles of hairs --> arrector pili muscles bundles of smooth muscle fibres, attached to the deep part of the hair... Read More

Epidermis

Epidermis Definition What is the epidermis? We can define the epidermis as one or more layers of cells forming the tough... Read More

Hypomelanism

All the body cells of living organisms bear some color due to one or the other pigment molecule or complex. The pigment can... Read More

Eumelanin

Definition noun An aggregate of pigment molecules, each made up of cross-linked 5,6-dihydroxyindole (DHI) and... Read More

Albinism

Definition noun A hereditary, congenital disorder characterized by the complete or partial lack of pigmentation production... Read More

Albino

Definition noun, plural: albaninos An organism with albinism, which is a condition characterized mainly by a lack of or an... Read More

Smooth muscle

The smooth muscle can be described as a type of muscle in the human body that is non-striated and involuntary in action.... Read More

Sebaceous gland

Definition noun, plural: sebaceous glands An exocrine gland secreting sebum that lubricates hair and skin Supplement A... Read More

Polygenic trait

Polygenic Trait Definition Polygenic trait refers to a trait that is controlled by multiple non-allelic genes. These genes... Read More

Synophrys

Definition noun Medical term for hypertrichosis in between the eyebrows, thus giving an appearance of a single long eyebrow... Read More

Woolly cheetah

Woolly cheetahs were reported in the 19th century as a separate species of cheetah that had longer, denser fur. Several... Read More

Incomplete dominance

Incomplete Dominance Definition After Gregor Mendel discovered inheritance laws, the term ''incomplete dominance'' was... Read More

Widows peak

widow's peak A sharp point of hair growth in the midline of the anterior scalp margin, usually resulting from recession of... Read More

Fur

Fur 1. The short, fine, soft hair of certain animals, growing thick on the skin, and distinguished from the hair, which is... Read More

Sebum

Definition noun An oily substance produced and secreted by sebaceous gland Supplement Sebum is the substance produced and... Read More

Apocrine gland

The human body is a complex assemblage of many different organs, systems, glands, bones, and tissues. Weighing any one over... Read More

Characteristic

Characteristics Definition We can define characteristics as qualities or features that describe the distinctive nature or... Read More

Scalp

scalp 1. That part of the integument of the head which is usually covered with hair. By the bare scalp of robin Hodd's fat... Read More

Melanism

Definition noun The condition wherein an unusually high amount of melanin is produced and deposited resulting in the dark... Read More

Pheomelanin

Definition noun A type of melanin pigment that is made up of benzothiazine units and is responsible for yellow and pink to... Read More

Glochid

Definition noun, plural: glochids Any of the hair-like spine or bristle often with a barbed tip on... Read More

Areole

Definition noun, plural: areoles (botany) A spot, which may be raised or depressed, on the cactus body where spines, hair,... Read More

Follicle-stimulating hormone

Follicle Stimulating Hormone Definition In the pituitary gland of the brain, gonadotropic hormones are released.... Read More

Melanin

Definition noun A group of insoluble pigments found in melanophores and produced from the oxidation of tyrosine, followed by... Read More

Ulotrichous

ulotrichous Having curly hair. Compare: leiotrichous. Origin: G. Oulotrichos, curly haired, fr. Oulos, wooly, - thrix... Read More