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.
The circulatory system is an organ system that passes nutrients (such as amino acids and electrolytes), gases, hormones, blood cells, nitrogen waste products, etc. to and from cells in the body to help fight diseases and help stabilize body temperature and pH to maintain homeostasis.rgans: In biology and anatomy, an organ is a tissue that performs a specific function or group of functions within an organism.. more Â». Systems: The organ systems of the body include the musculoskeletal system, nervous system, digestive system... more Â». Skeleton: The average adult human skeleton has around 206 bones.