Tagged: Xylem vessels

December 30, 2017

Role of the respiratory system in the excretion process in man and Respiration in plant

The human body contains a system that is responsible for the extraction of oxygen from the air and then transfers it to the blood, then to the cells of the body, this system is...

Biology

November 18, 2017

Structure of leaf & green plastid , Mechanism of photosynthesis in green plants

Green leaves are the main sites of photosynthesis as they contain the green plastids in the higher plants , Green herbaceous stems may participate , to some extent , in this process as they...