170
edits
Changes
Jump to navigation
Jump to search
→Notes for teachers
Line 96:
Line 96:
===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'''