Monotremes are egg laying mammals (Prototheria) instead of mammals which give birth to live young like marsupials (Metatheria) and placental mammals (Eutheria). They are still classified as mammals because they feed their young on mothers' milk. Australia has two species of monotremes: the platypus and the short-beaked echidna.
What cs carries substances around the body? The circulatory system is they system in the body that transports  material throughout the body. It carries nutrients, water, and  oxygen to all the cells and carries waste â¦material away from the  cells. Making the world better, one answer at a time. the substances that blood carry as it goes around in the body are the vitamins, nutrients, hormones, chemical substances, oxygen and CO2 or carbon doixide.
A nutrient is a substance used by an organism to survive, grow, and reproduce. The requirement for dietary nutrient intake applies to animals, plants, fungi, and protists. Nutrients can be incorporated into cells for metabolic purposes or excreted by cells to create non-cellular structures, such as hair, scales, feathers, or exoskeletons. Some nutrients can be metabolically converted to smaller molecules in the process of releasing energy, such as for carbohydrates, lipids, proteins, and ferment