Comparing Transport Systems in flowering Plants and Mammals essays

Comparing Transport Systems in flowering Plants and Mammals essays Unit 2 Biology- FUNCTIONING ORGANISMS SAC- Essay on transport systems Transport systems play an essential role in the survival of flowering plants and mammals Transport systems play an essential role in the survival of flowering plants and mammals. These organisms rely entirely on the transport of water, oxygen and nutrients to every cell. To supply these products at a rate the organisms demand to sustain life, they have developed a specialised transport system. Simple diffusion from the organisms surface to their inside would just be too slow because of mammal and flowering plants small surface area in comparison to its volume. The transport system in mammals and plants is relatively similar as they transport materials through specialised tubes, and use water as a basis for transport due to its ideal properties. Mammals tubes are known as blood vessels and form a circulatory vascular system. Blood vessels are elastic tubes that carry blood from the heart, distribute it through the body, and return it back to the heart. The blood vessels that transport blood away from the heart are the arteries which are the largest in size of the vessels. These divide into smaller arteries (arterioles), which then divide into microscopic vessels (capillaries). The capillaries rejoin to form small veins and then large veins which carry the blood back to the heart. Mammals also have a lymphatic system which plays a different role in the transport system. The lymphatic system consists of lymph vessels, lymph nodes and lymph fluid. Lymph vessels are like veins except they carry a clear fluid containing mostly water and protei n called lymph, instead of blood. Lymph is composed of excess fluid from tissues, waste products, and immune system cells. The lymphatic system drains away that excess body fluid from the cells with the lymph seeping out of the blood vessels and into the body tissues. ...