Whaling
Whales have been hunted for their meat and oil for centuries. In the 18th and 19th century, whaling became an industry. As time went on, whaling fleets caught more whales than the animals could reproduce.
Environment
biology
Biology
Blood
Introduction Blood is an important fluid that keeps us alive. We cannot live without it. The heart pumps blood to all parts of the body and brings them oxygen and food. At the same time blood carries all the substances we don’t need away from us. Blood fights infections, keeps our body temperature the same