What is the blood circulation? The circulatory system is a self-contained vascular system with supply and disposal functions. It supplies all the body’s cells with vital substances such as oxygen (bound to the red blood pigment hemoglobin), nutrients, vitamins and minerals. Waste products (such as carbon dioxide), on the other hand, are transported away from … Blood circulation: structure, functions, and disorders
Amniotic sac: Protected living space The amniotic sac is a sac consisting of egg membranes that increasingly fills with fluid (amniotic fluid) as the child grows. This allows the growing child to swim freely, attached only to the umbilical cord. This enables the child to build up its muscles and skeleton and to grow evenly. … Amniotic Fluid: Functions and Background Information
A microwave oven is in well over half of all households. To what extent it is used, however, varies greatly. Often it is only used to heat up and defrost food. But the microwave oven can do much more. Opinions are also divided on the effect of microwaves on health and food. There are still … Preparing Food in the Microwave: Facts and Myths
