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→Notes for teachers
===Notes for teachers===
===Notes for teachers===
#'''In birds fore limbs are modified into wing,body is covered with feathers,beak protudes out of oral cavity'''
#'''They are the first evolved eurythermal vertebrates,have four chambered heart facilitating two way blood circulation to seperate oxygenated blood and deoxygenated blood'''
#'''Birds have special sound box called syrinx'''
===Activities===
===Activities===
#Activity No #1 '''page_name_concept_name_activity1'''
#Activity No #1 '''page_name_concept_name_activity1'''