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.
1 The tonsils and thymus, which make antibodies. 2  The lymph nodes and vessels (the lymphatic system). 3  This network of lymph nodes and vessels throughout the body carries lymph fluid, nutrients, and waste material between the body tissues and the bloodstream.