E). Write any two function of heart? b). Write any two different between artery and vein.
c). What is glandular system. Why one-one hormones produces by
Thyroid gland and pancreas.
d). What is malnutrition? Write down any two disease caused by it.
e). What is menstruation?
). What is night blindness? Write it's two symptoms.
E). What is immunization?
a). How is Hepatitis B transmitted from one person to another?
revention measures.​