State the main functions of the following :
(i) Medulla Oblongata
(ii) Cytokinins
(iii) Tears
(iv) Coronary Artery
(v) Seminal Vesicles
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(i) The function of Medulla Oblongata is to control the activities of the internal organs, for example, peristaltic movement of the alimentary canal, movement of breathing, beating of the heart and many other involuntary actions.
(ii) Cytokinins inhibits apical dominance, stimulate cell division and cell elongation and prevent ageing of plant parts.
(iii) The functions of Tears include lubricating the surface of eyes, wash away dust particles, help in killing germs.
(iv) The Coronary Artery delivers blood to the heart muscles.
(v) Seminal vesicles produce a secretion which serves as a medium for transportation of the sperms.