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.
The lymphatic organs are the red bone marrow, the thymus gland, lymph nodes, lymph nodules, and the spleen. Lymph nodes: On its way back to the blood, lymph is filtered through lymph nodes, that are located in clusters along the pathway of the lymphatic vessels.ymph capillaries merge to form lymphatic vessels, which carry lymph into and out of structures called lymph nodes and finally back to the vascular system. Like blood capillaries, lymphatic capillaries are made of a single layer of squamous epithelial cells.