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.
This means that your cells are constantly accepting and releasing nutrients, minerals, water, protein and other substances to make sure that your body has exactly what it needs--and no more. The process of moving material into and out of cells is called cell transport.