The shield and spear of the Roman god Mars, which is also the alchemical symbol for iron, represents the male sex. Mars was the Roman Warrior god, the son of Juno and Jupiter, husband of Bellona, and the lover of Venus. Alchemic symbols, originally devised as part of the Protoscience of Alchemy, were used to denote some elements and some compounds until the 18th century

Male (♂) refers to the sex of an organism, or part of an organism, which produces small mobile gametes, called spermatozoa. A gamete (from Ancient Greek γαμέτης; translated gamete = wife gametes = husband is a cell that fuses with another gamete A spermatozoon or spermatozoan ( pl spermatozoa) from the Ancient Greek σπέρμα (seed and ζῷον (living being and more commonly known Each spermatozoon can fuse with a larger female gamete or ovum, in the process of fertilization. Female (♀ is the Sex of an Organism, or a part of an organism which produces ova (egg cells An ovum (plural ova) is a Haploid Female reproductive cell or Gamete. For soil improvement see Fertilization (soil. A male cannot reproduce sexually without access to at least one ovum from a female, but some organisms can reproduce both sexually and asexually. The Evolution of sexual reproduction is a major puzzle The first Fossilized evidence of sexually reproducing Organisms is from Eukaryotes of the Stenian

Not all species share a common sex-determination system. A sex-determination system is a biological system that determines the development of sexual characteristics in an Organism. In humans and most animals, sex is determined genetically but in other species it can be determined due to social, environmental, or other factors. Genetics (from Ancient Greek grc-Latn genetikos, “genitive” and that from grc-Latn genesis, “origin” a discipline of Biology, is The existence of two sexes seems to have been selected independently across different evolutionary lineages (see Convergent Evolution). An evolutionary lineage is a sequence of Species, that form a line of descent each new species the direct result of speciation from an immediate ancestral species Convergent evolution describes the acquisition of the same biological trait in unrelated lineages Accordingly, sex is defined operationally across species by the type of gametes produced (ie: spermatozoa vs. An operational definition is a demonstration of a process &mdash such as a Variable, term, or object &mdash relative in terms of the specific Process ova) and differences between males and females in one lineage are not always predictive of differences in another.

Male/Female dimorphism between organisms or reproductive organs of different sexes is not limited to animals; male gametes are produced by chytrids, diatoms and land plants, among others. Female (♀ is the Sex of an Organism, or a part of an organism which produces ova (egg cells Sexual dimorphism is the systematic difference in form between individuals of different Sex in the same Species. Chytridiomycota is a Division of the Fungi kingdom. The name refers to the chytridium (from the Greek Diatoms ( Greek: (dia = "through" + (temnein = "to cut" i Plants are living Organisms belonging to the kingdom Plantae. In land plants, female and male designate not only the female and male gamete-producing organisms and structures but also the structures of the sporophytes that give rise to male and female plants. All land plants and some Algae, have life cycles in which a haploid Gametophyte generation alternates with a Diploid sporophyte, the generation of a

Anatomy

All males, regardless of independent origin, kingdom, or other phylogenetic subdivision, share at least the anatomy to produce male gametes. Some have sophisticated organs and organ systems designed to produce, dispense, and deliver the gamete to a location suitable for ovum fertilization. In Biology, an organ ( Latin: organum, "instrument tool" from Greek όργανον - organon "organ instrument In Biology, a system is a group of organs that work together to perform a certain task

Even where structures and cell types have arisen independently, "sperm" is ordinarily used to refer to the male gamete. The term sperm is derived from the Greek word (σπέρμα sperma (meaning "seed" and refers to the male reproductive cells. Among animals that undergo internal fertilization, "penis" is often used to refer to an organ inserted into the female for insemination. Internal fertilization is a form of Animal fertilization of an Ovum by Spermatozoon within the body of an inseminated animal whether female or hermaphroditic The penis (plural penises, penes Insemination is the introduction of sperm into the female Uterus of a Mammal or the Oviduct of an Oviparous (egg-laying animal during This process is called sexual intercourse. Sexual intercourse, in its biological sense is the act in which the male reproductive organ (in humans and other higher animals enters the female reproductive tract

Symbol

A common symbol used to represent the male gender is the Mars symbol, ♂ (Unicode: U+2642 Alt codes: Alt+11)—a circle with an arrow pointing northeast. A gender symbol is a Symbol used to denote the Sex of a Life form or the Gender of a human being In Computing, Unicode is an Industry standard allowing Computers to consistently represent and manipulate text expressed in most of the world's In PCs running the Microsoft Windows or DOS Operating systems additional characters to those available by the current Keyboard layout may be typed This is often called a stylized representation of the Roman god Mars' shield and spear. Roman mythology, or more appropriately Latin mythology, refers to the mythological beliefs of the Italic people inhabiting the region of Latium and its Mars was the Roman Warrior god, the son of Juno and Jupiter, husband of Bellona, and the lover of Venus. Also, this symbol is found on the logo of the popular automobile manufacturer Volvo. This article is about Volvo Group - AB Volvo Volvo Cars is the passenger vehicle maker owned by Ford Motor Company, using the Volvo Trademark

Sex determination

Main article: Sex-determination system

The sex of a particular organism may be determined by a number of factors. A sex-determination system is a biological system that determines the development of sexual characteristics in an Organism. These may be genetic or environmental, or may naturally change during the course of an organism's life. Although most species with male and female sexes have individuals that are either male or female, hermaphroditic animals, such as worms, have both male and female reproductive organs. A hermaphrodite is an organism having both male and female reproductive organs Worms (voɐms is a City in Rhineland-Palatinate, Germany, on the Rhine River

Genetic determination

Most mammals, including humans, are genetically determined as such by the XY sex-determination system where males have an XY (as opposed to XX) sex chromosome. Mammals ( class Mammalia) are a class of Vertebrate Animals characterized by the presence of Sweat glands, including sweat glands Human beings, humans or man (Origin 1590–1600 L homō man OL hemō the earthly one (see Humus The XY sex-determination system is the Sex-determination system found in Humans most other Mammals some insects ( Drosophila) and some A chromosome is an organized structure of DNA and Protein that is found in cells. It is also possible in a variety of species, including human beings, to be XXY or have other intersex/hermaphroditic qualities. These qualities are widely reported to be as common as redheadedness (about 2% of the population). ^[1]During reproduction, a male can give either an X sperm or a Y sperm, while a female can only give an X egg. Reproduction is the Biological process by which new individual Organisms are produced A Y sperm and an X egg produce a boy, while an X sperm and an X egg produce a girl. BOY is a Canadian Indie pop band The band consists of vocalist and general instrumentalist Stephen Kozmeniuk, drummer Maurie Kaufmann, A girl is any Female Human from birth through Childhood and Adolescence to attainment of Adulthood The term may also be used to mean The ZW sex-determination system, where males have a ZZ (as opposed to ZW) sex chromosome may be found in birds and some insects (mostly butterflies and moths) and other organisms. The ZW sex-determination system is a system that determines the sex of offspring in Birds, some Fish, and some Insects (including Butterflies Birds ( class Aves) are bipedal endothermic ( Warm-blooded) Vertebrate animals that lay eggs. Insects ( Class Insecta) are a major group of Arthropods and the most diverse group of Animals on the Earth with over a million described Members of Hymenoptera, such as ants and bees, are determined by haplodiploidy, where most males are haploid and females and some sterile males are diploid. Hymenoptera is one of the larger orders of Insects comprising the sawflies, Wasps Bees and Ants The name refers to Ants are social Insects of the family Formicidae and along with the related families of Wasps and Bees belong to the order Bees are flying Insects closely related to Wasps and Ants Bees are a Monophyletic lineage within the superfamily Apoidea The haplodiploid sex-determination system determines the sex of the offspring of many Hymenopterans ( Bees Ants and Wasps, and coleopterans ( "Haplo" redirects here For the fictional character see The Death Gate Cycle. "Haplo" redirects here For the fictional character see The Death Gate Cycle.

Environmental determination

In some species of reptiles, including alligators, sex is determined by the temperature at which the egg is incubated. for differences between alligators and crocodiles please see Crocodilia An Alligator is a Crocodilian in the Genus Other species, such as some snails, practise sex change: adults start out male, then become female. The word snail is a Common name that can be used for almost all members of the Molluscan class Gastropoda which have coiled shells in the In tropical clown fish, the dominant individual in a group becomes female while the other ones are male. Clownfish and anemonefish are Fishes from the subfamily Amphiprioninae in the family Pomacentridae.

In some arthropods, sex is determined by infection. Arthropods are Animals belonging to the Phylum Arthropoda (from Greek ἄρθρον arthron, " Joint " Bacteria of the genus Wolbachia alter their sexuality; some species consist entirely of ZZ individuals, with sex determined by the presence of Wolbachia. The Bacteria ( singular: bacterium) are a large group of unicellular Microorganisms Typically a few Micrometres in length bacteria have

Secondary sex characteristics

Main article: Secondary sex characteristic

In those species with two sexes, males may differ from females in ways other than production of spermatozoa. Secondary sex characteristics are traits that distinguish the two Sexes of a species but that are not directly part of the Reproductive system. Males are generally smaller than females in seed plants (the pollen grain is the male plant) and many fishes and birds, but larger in many mammals, including humans. Pollen is a fine to coarse powder consisting of microgametophytes ( pollen grains) which produce the male Gametes (sperm cells of In birds, the male often exhibits a colorful plumage that attracts females. Plumage refers both to the layer of Feathers that cover a Bird and the pattern colour and arrangement of those feathers

See also

• Man
• Boy
• Male pregnancy
• Gender