Vertebrates, including humans, have an endoskeleton. The other two types of skeletons are hydroskeletons and exoskeletons.Know More
The root word "endo-" comes from the Greek word "endon" meaning "inside or within." An endoskeleton is a skeleton that is contained inside the body, and is made up of cartilage and bones. The bones offer support and structure, while cartilage provides cushioning and flexibility. Some vertebrates, such as sharks, have a skeleton that is composed mostly of cartilage. Most vertebrates, including humans, have cartilage that is eventually replaced by bone as the body grows.
In contrast, "exo-" is derived from the word for "external or outside." Animals with an exoskeleton include grasshoppers, cockroaches, lobsters and crabs. Earthworms, jellyfish, starfish and other soft-bodied creatures have a hydroskeleton, also referred to as a hydrostatic skeleton.Learn more about Zoology
Major bones on a mouse skeleton include the skull, mandible, scapula, ribs, pelvis, femur, tibia, fibula, radius, ulna, humerus and several vertebrae along the spine. The anatomy of small mice was not fully diagrammed or drawn until 1965 when scientists made detailed drawings of the skeletal, circulatory and endocrine systems of laboratory mice.Full Answer >
Wild animals such as the Arctic fox usually do not make good pets, as they are not accustomed to humans and can have very different needs than an ordinary pet. The silver fox, however, is a domesticated version of the red fox that has been bred by Russian geneticists.Full Answer >
The scientific name for humans is Homo sapiens. It is thought that this species of human descended from Homo heidelbergensis. It is a myth that Homo sapiens descended from Neanderthals, who also share ancestry with Homo heidelbergensis.Full Answer >
Some examples of diurnal animals are humans, birds, pet dogs and cats, squirrels, elephants, gorillas, hawks, butterflies and honeybees. All of these animals are considered diurnal because they are mainly active during the day and asleep at night.Full Answer >