Xylem

Structure - cells are dead at maturity

Function  - transporting water and minerals from roots

Transporation-cohesion or cohesion-tension - explains that transpiration, cohesion (water sticking to water) and adhesion (water sticking to xylem walls) all act to move water to the tops of trees

Phloem

Structure - cells are alive at maturity

Function  - transporting sugar resolution from source to sink (high to low concentration)

Pressure flow theory - explains the movement of carbohydrates nutrients in plants. When sugar is made, it is actevly transported into phloem cells. Water then moves into the phloem cells by osmosis, which increases the turgor pressure. 

Atria

These push blood into the ventricoles.

Ventricles

these pump the blood to the lungs and body.

Valves

these prevent backflow of blood and are located between the atria and ventricles and also between the ventricles and the blood vessels (arteries) through which blood flows away from the heart