Post by Deinobrontornis on Dec 3, 2011 17:58:43 GMT -5
Human - Homo sapiens
Humans (known taxonomically as Homo sapiens, Latin for "wise man" or "knowing man") are the only living species in the Homo genus. Anatomically modern humans originated in Africa about 200,000 years ago, reaching full behavioral modernity around 50,000 years ago.
Human body types vary substantially. Although body size is largely determined by genes, it is also significantly influenced by environmental factors such as diet and exercise. The average height of an adult human is about 1.5 to 1.8 m (5 to 6 feet) tall, although this varies significantly from place to place and depending on ethnic origin. The average mass of an adult human is 54–64 kg (120–140 lbs) for females and 76–83 kg (168–183 lbs) for males. Weight can also vary greatly (e.g. obesity). Unlike most other primates, humans are capable of fully bipedal locomotion, thus leaving their arms available for manipulating objects using their hands, aided especially by opposable thumbs. Humans tend to be physically weaker than other similarly sized primates, with young, conditioned male humans having been shown to be unable to match the strength of female orangutans which are at least three times stronger.
The dental formula of Humans is the following: Upper: 2.1.2.3, lower: 2.1.2.3. Humans have proportionately shorter palates and much smaller teeth than other primates. They are the only primates to have short, relatively flush canine teeth. Humans have characteristically crowded teeth, with gaps from lost teeth usually closing up quickly in young specimens. Humans are gradually losing their wisdom teeth, with some individuals having them congenitally absent.
Spectacled Caiman - Caiman crocodilus
Length: 2-2.5 meters (6.6-8.2 ft)
Weight: 40-80 kg (88-176 lbs)
The spectacled caiman (Caiman crocodilus), also known as the white caiman or common caiman, is a crocodilian reptile found in much of Central and South America. It lives in a range of lowland wetland and riverine habitat types and can tolerate salt water as well as fresh; due in part to this adaptability it is the most common of all crocodilian species. Males of the species are generally 2 to 2.5 meters (6.6 to 8.2 ft), while females are smaller, usually around 1.4 meters (4.6 ft). The species' common name comes from a bony ridge between the eyes, which gives the appearance of a pair of spectacles. They have been known to change color. During colder weather the black pigment, found within their skin cells, will expand making them darker.
Humans (known taxonomically as Homo sapiens, Latin for "wise man" or "knowing man") are the only living species in the Homo genus. Anatomically modern humans originated in Africa about 200,000 years ago, reaching full behavioral modernity around 50,000 years ago.
Human body types vary substantially. Although body size is largely determined by genes, it is also significantly influenced by environmental factors such as diet and exercise. The average height of an adult human is about 1.5 to 1.8 m (5 to 6 feet) tall, although this varies significantly from place to place and depending on ethnic origin. The average mass of an adult human is 54–64 kg (120–140 lbs) for females and 76–83 kg (168–183 lbs) for males. Weight can also vary greatly (e.g. obesity). Unlike most other primates, humans are capable of fully bipedal locomotion, thus leaving their arms available for manipulating objects using their hands, aided especially by opposable thumbs. Humans tend to be physically weaker than other similarly sized primates, with young, conditioned male humans having been shown to be unable to match the strength of female orangutans which are at least three times stronger.
The dental formula of Humans is the following: Upper: 2.1.2.3, lower: 2.1.2.3. Humans have proportionately shorter palates and much smaller teeth than other primates. They are the only primates to have short, relatively flush canine teeth. Humans have characteristically crowded teeth, with gaps from lost teeth usually closing up quickly in young specimens. Humans are gradually losing their wisdom teeth, with some individuals having them congenitally absent.
Spectacled Caiman - Caiman crocodilus
Length: 2-2.5 meters (6.6-8.2 ft)
Weight: 40-80 kg (88-176 lbs)
The spectacled caiman (Caiman crocodilus), also known as the white caiman or common caiman, is a crocodilian reptile found in much of Central and South America. It lives in a range of lowland wetland and riverine habitat types and can tolerate salt water as well as fresh; due in part to this adaptability it is the most common of all crocodilian species. Males of the species are generally 2 to 2.5 meters (6.6 to 8.2 ft), while females are smaller, usually around 1.4 meters (4.6 ft). The species' common name comes from a bony ridge between the eyes, which gives the appearance of a pair of spectacles. They have been known to change color. During colder weather the black pigment, found within their skin cells, will expand making them darker.
