Fish Circulatory System by uzma nihar

Description

Fish have a closed circulatory system with a two-chambered heart. Blood moves through arteries to the gills to exchange gases and then to the body through veins. The blood contains red blood cells, white blood cells, plasma, and platelets. Red blood cells contain hemoglobin and transport oxygen, while white blood cells help fight infection. The heart pumps blood through the sinus venosus, atrium, ventricle, and bulbus arteriosus in a single circulation before returning to the heart.