Red deer are even-toed ungulates, ruminants. Their males have spectacular antlers.
A type of snake with a characteristic spot on its neck.
Freshwater fish used as food in many parts of the world.
The fastest track-based means of urban transport.
This animation demonstrates the anatomy of birds through the example of mallards.
The reproductive system consists of organs which work together for the purpose of reproduction.
Surface epithelia cover the external and internal surfaces of the body
Synovial joints can be categorised by the direction of movement they allow.
The reflex triggered by the stretching of the thigh extensor muscle is the patellar reflex.
The zygote is the initial cell formed when two gamete cells are joined by means of sexual reproduction.
Glands of the endocrine system secrete hormones into the blood.
The reproductive system is a series of organs working together for the purpose of reproduction.
Careful tooth brushing is an important part of oral hygiene.
The knee joint is made up by the femur, the tibia and the kneecap.
During swallowing food travels from the mouth cavity into the stomach.
ATP is the main source of energy for cells.
NAD⁺ is a coenzyme that plays an important role mainly in catabolic processes, while NADP is important in anabolic processes as hydrogen carriers.
The Hypothalamic-pituitary axis is the regulating centre of our endocrine system.
Two meshing gears transmit torque during their rotational motion.
This animation demonstrates the geographical locations of the Earth's major cities.