HOME



picture info

Human Physical Appearance
Human physical appearance is the outward phenotype right , Here the relation between genotype and phenotype is illustrated, using a Punnett square, for the character of petal color in pea plants. The letters B and b represent gene In biology, a gene (from ''genos'' "...Wilhelm Johannsen ... or look of human beings. There are infinite variations in human phenotypes, though society reduces the variability to distinct categories. The physical appearance of humans, in particular those attributes which regarded as important for physical attractiveness Physical attractiveness is the degree to which a person's physical features are considered aesthetic Aesthetics, or esthetics (), is a branch of philosophy that deals with the nature of beauty and taste (sociology), taste, as well as th ..., are believed by anthropologistAn anthropologist is a person engaged in the practice of anthropology. Anthropology is the study of aspects of humans within past and present So ...
[...More Info...]      
[...Related Items...]



picture info

Phenotype
In genetics Genetics is a branch of biology Biology is the natural science that studies life and living organisms, including their anatomy, physical structure, Biochemistry, chemical processes, Molecular biology, molecular interactions, Physiology, ..., the phenotype () is the set of observable characteristics or traits Trait may refer to: * Phenotypic trait in biology, which involve genes and characteristics of organisms * Trait (computer programming), a model for structuring object-oriented programs (a template class in the C++ programming language) * Trait the ... of an organism In biology Biology is the natural science that studies life and living organisms, including their anatomy, physical structure, Biochemistry, chemical processes, Molecular biology, molecular interactions, Physiology, physiological me .... The term covers the organism's morphology or physical form and structure, its developmental processes, its biochemical and physi ...
[...More Info...]      
[...Related Items...]



picture info

Androgenic Hair
Body hair, or androgenic hair, is the terminal hair that develops on the human body during and after puberty. It is differentiated from the head hair and less visible vellus hair, which is much finer and lighter in color. The growth of androgenic hair is related to the level of androgens (often referred to as male hormones) and the density of androgen receptors in the dermal papillae. Both must reach a threshold for the proliferation of hair follicle cells. From childhood onward, regardless of sex, vellus hair covers almost the entire area of the human body. Exceptions include the lips; the backs of the ears; the palms of hands; the soles of the feet; certain external Sex organ, genital areas; the navel; and scar tissue. The density of hair – i.e. the number of hair follicles per unit area of skin – varies from person to person. In many cases, areas on the human body that contain vellus hair will begin to produce darker and thicker body hair, such as the first growth ...
[...More Info...]      
[...Related Items...]



picture info

Earlobes
The human earlobe (''lobulus auriculae''), the lower portion of the outer ear, is composed of tough Loose_connective_tissue#Areolar_tissue, areolar and adipose connective tissues, lacking the firmness and elasticity of the rest of the auricle (anatomy), auricle (the external structure of the ear). In some cases the lower lobe is connected to the side of the face. Since the earlobe does not contain cartilage it has a large blood supply and may help to warm the ears and maintain balance. However, earlobes are not generally considered to have any major biological function. The earlobe contains many nerve endings, and for some people is an erogenous zone. The zoologist Desmond Morris in his book ''The Naked Ape'' (1967) conjectured that the lobes developed as an additional erogenous zone to facilitate the extended sexuality necessary in the evolution of human monogamous pair bonding. Organogenesis The earlobe, as a body part built of epithelium and connective tissue, might appe ...
[...More Info...]      
[...Related Items...]



picture info

Nasal Bridge
The nasal bridge is the upper, bony part of the human nose The human nose is the most protruding part of the face The face is the front of an animal's head that features the eyes Eyes are organs An organ is a group of tissues with similar functions. Plant life and animal life rely on many ..., which overlies the nasal bone The nasal bones are two small oblong bone A bone is a Stiffness, rigid tissue (anatomy), tissue that constitutes part of the skeleton in most vertebrate animals. Bones protect the various organs of the body, produce red blood cell, red and whi ...s. Association with epicanthic folds Low-rooted nasal bridges are closely associated with epicanthic fold An epicanthic fold or epicanthus is a skin fold Skin folds or skinfolds are areas of skin Skin is the layer of usually soft, flexible outer tissue covering the body of a vertebrate animal, with three main functions: protection, regulation, an ...s. A lower nasal bridge is more likely ...
[...More Info...]      
[...Related Items...]



picture info

Human Nose
The human nose is the most protruding part of the face The face is the front of an animal's head that features the eyes Eyes are organs An organ is a group of tissues with similar functions. Plant life and animal life rely on many organs that co-exist in organ systems. A given organ's tis .... It bears the nostril A nostril (or naris , plural ''nares'' ) is one of the two channels of the nose, from the point where they bifurcate to the external opening. In bird Birds are a group of warm-blooded vertebrates constituting the class (biology), class ...s and is the first organ of the respiratory system The respiratory system (also respiratory apparatus, ventilatory system) is a biological system A biological system is a complex network which connects several biologically relevant entities. Biological organization spans several scales and are d .... It is also the principal organ in the olfactory system The olfactory system, or sense of smell, is ...
[...More Info...]      
[...Related Items...]



picture info

Eyelid
An eyelid is a thin fold of skin that covers and protects an eye Eyes are organs of the visual system. They provide living organisms with vision, the ability to receive and process visual detail, as well as enabling several photo response functions that are independent of vision. Eyes detect light L .... The levator palpebrae superioris muscle The levator palpebrae superioris ( la, elevating muscle of upper eyelid) is the muscle Muscle is a soft tissue found in most animals. Muscle cells contain protein Proteins are large biomolecules or macromolecules that are comprised of on ... retracts the eyelid, exposing the cornea to the outside, giving vision. This can be either voluntarily or involuntarily. The human eyelid features a row of eyelash An eyelash (also called lash) (Latin: ''Cilia'') is one of the hairs that grows at the edge of the eyelids. It grows in one layer on the edge of the upper and lower eyelids. Eyelashes protect the eye from debri ...
[...More Info...]      
[...Related Items...]



picture info

Epicanthic Fold
An epicanthic fold or epicanthus is a skin fold Skin folds or skinfolds are areas of skin Skin is the layer of usually soft, flexible outer tissue covering the body of a vertebrate animal, with three main functions: protection, regulation, and sensation. Other cuticle, animal coverings, such ... of the upper eyelid An eyelid is a thin fold of skin that covers and protects an eye Eyes are organs of the visual system The visual system comprises the sensory organ (the eye) and parts of the central nervous system (the retina containing photorecepto ... that covers the inner corner (medial canthus Canthus (pl. canthi, palpebral commissures) is either corner of the eye where the upper and lower eyelid An eyelid is a thin fold of skin that covers and protects an eye. The levator palpebrae superioris muscle retracts the eyelid, exposing th ...) of the eye Eyes are organs of the visual system. They provide living organisms with vision, the ability to recei ...
[...More Info...]      
[...Related Items...]



picture info

Human Eye
The human eye is a sense organ A sense is a biological system A biological system is a complex biological network, network which connects several biologically relevant entities. Biological organization spans several scales and are determined based different structures dependi ... that reacts to light Light or visible light is electromagnetic radiation within the portion of the electromagnetic spectrum that is visual perception, perceived by the human eye. Visible light is usually defined as having wavelengths in the range of 400–700 nan ... and allows vision Vision or The Vision may refer to: Perception Optical perception * Visual perception Visual perception is the ability to interpret the surrounding environment (biophysical), environment through photopic vision (daytime vision), color visio .... Rod and cone A cone is a three-dimensional Three-dimensional space (also: 3-space or, rarely, tri-dimensional space) is a geometric setting in which th ...
[...More Info...]      
[...Related Items...]



picture info

Eye Color
Eye color is a polygenicA polygene is a member of a group of non-epistatic gene In biology, a gene (from ''genos'' "...Wilhelm Johannsen coined the word gene to describe the Mendelian_inheritance#History, Mendelian units of heredity..." (Greek language, Greek) meani ... phenotypic character determined by two distinct factors: the pigment A pigment is a colored material that is completely or nearly insoluble in water. In contrast, dyes are typically soluble, at least at some stage in their use. Generally dyes are often organic compound , CH4; is among the simplest organic compou ...ation of the eye Eyes are organs of the visual system. They provide living organisms with vision, the ability to receive and process visual detail, as well as enabling several photo response functions that are independent of vision. Eyes detect light L ...'s iris and the frequency-dependence of the scattering Scattering is a term used in physics to describe a wide range ...
[...More Info...]      
[...Related Items...]



picture info

Hair Texture
Hair is a protein filament that grows from hair follicle, follicles found in the dermis. 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 hair, 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 alpha-keratin. Attitudes towards different forms of hair, such as hairstyles and hair removal, vary widely across different cultures and historical periods, but it is often used to indicate a person's personal beliefs or social position, such as their age, sex, or religion. Overview The word "hair" usually refers to two distinct structures: #the part beneath the skin, called the hair follicle, or, when pulled from the skin, the bulb or root. This organ is located in the dermis and maintains stem cells, which not only re-grow the ha ...
[...More Info...]      
[...Related Items...]



picture info

Hair Color
Hair color is the pigmentation of hair follicle The hair follicle is an organ Organ may refer to: Biology * Organ (anatomy) An organ is a group of Tissue (biology), tissues with similar functions. Plant life and animal life rely on many organs that co-exist in organ systems. A given orga ...s due to two types of melanin Melanin (; from el, μέλας ''melas'', "black, dark") is a broad term for a group of natural pigments found in most organism In biology, an organism (from Ancient Greek, Greek: ὀργανισμός, ''organismos'') is any individu ...: eumelanin Melanin (; from el, μέλας ''melas'', "black, dark") is a broad term for a group of natural pigment A pigment is a colored material that is completely or nearly insoluble in water. In contrast, dyes are typically soluble, at least at ... and pheomelanin Melanin (; from el, μέλας ''melas'', "black, dark") is a broad term for a group of natural pigment A pigment is a c ...
[...More Info...]      
[...Related Items...]



picture info

Freckle
Freckles are clusters of concentrated melanin Melanin (; from el, μέλας ''melas'', "black, dark") is a broad term for a group of natural pigments found in most organisms. Melanin is produced through a multistage chemical process known as melanogenesis, where the oxidation of the ami ...ized cells which are most easily visible on people with a fair complexion Complexion in humans is the natural color Color (American English American English (AmE, AE, AmEng, USEng, en-US), sometimes called United States English or U.S. English, is the set of varieties of the English language native to the .... Freckles do not have an increased number of the melanin-producing cells, or melanocyte Melanocytes are melanin Melanin (; from el, μέλας ''melas'', "black, dark") is a broad term for a group of natural pigments found in most organisms. Melanin is produced through a multistage chemical process known as melanogenesis, wher ...s, but instead have melan ...
[...More Info...]      
[...Related Items...]