The erythrocyte has a large surface area to allow oxygen to pass through. It also contains hemoglobin which binds to oxygen. Macrophages (white blood cells) are great for helping engulf bacteria or viruses. They have long, thin pseudo pods that help capture bacteria or viruses so they can be swallowed, destroyed and digested.http://media-2.web.britannica.com/eb-media/89/20889-004-64D9A2F5.jpgEngine The neuron has adapted by being long and this helps them communicate with other parts of the body. The sheath acts as an insulator so that messages reach quickly. Dendrites connect with many other neurons.http://www.bbc.co.uk/schools/gcsebitesize/science/edexcel/responses_to_environment/thenervoussystemrev2.shtmlThe function of the male gamete (sperm) is to travel to the female gamete and connect inside to fertilize the egg. The male gamete has a long tail that helps it swim to reach the female gamete and a head that helps it enter the female