Human cardiovascular system
# Tasks
- circulation and transport
- nutrients
- gasses ($\ce{ O_{2} }$, $\ce{ CO_{2} }$)
- waste products
- ions
- hormones
- blood cells, antibodies
- maintains homeostasis
# composition of blood
almost constant
fluid connective tissue without fibres
# types of blood
plasma, and blood cells
# parts of the cardiovascular system
heart, arteries, veins, capillaries