Sporozoites are mobile, very small, slightly curved and both ends of the body are smooth. Their bodies are covered with elastic membranes. When an Anopheles mosquito, which carries malaria, bites a healthy person, the sporozoites enter the human body through the saliva of the mosquito. Sporozoites penetrate human liver cells within 30-45 minutes. Due to chemotaxis, it is carried by the blood and enters the liver and grows.