Teacher Edition. Photosynthesis is a complex process that converts light energy into chemical energy in the form of carbohydrates and/or other compounds in plants and other photosynthetic organisms. Photosynthesis occurs in two stages: light dependent and light independentreactions (Calvin Cycle).
The lymphatic system is part of the circulatory system and a vital part of the immune system, comprising a network of lymphatic vessels that carry a clear fluid called lymph (from Latin lympha meaning water) directionally towards the heart.ne of the main functions of the lymph system is to provide an accessory return route to the blood for the surplus three litres. The other main function is that of defense in the immune system. Lymph is very similar to blood plasma: it contains lymphocytes and other white blood cells.
Noun. 1. lymphatic system-the interconnected system of spaces and vessels between body tissues and organs by which lymph circulates throughout the body. systema lymphaticum. network of vessels, tissues, and organs in vertebrate animals that helps the body regulate fluid balance and fight against disease. The vessels of the lymphatic system drain excess fluid (called lymph) from the tissues and return it to the circulating blood. Lymphocytes circulate throughout the lymphatic system.