(a) Draw a sectional view of human heart and label, on it:
(i) Aorta
(ii) Right ventricle and
(iii) Pulmonary veins.
(b) State the role and functions of:
(i) blood
(ii) lymph in human transport system.
(a)
(b)
(i) Blood: Transport of nutrients, O2, CO2, Urea, hormones and WBC present in blood kills germs.
(ii) Lymph: It carries digested and absorbed fat from intestine; drains excess fluid from extracellular space back into the blood.