https://www.khanacademy.org/science/grade-5-science-pakistan-national-curriculum/x5132c0690d5e9b7d:microorganisms-and-diseases/x5132c0690d5e9b7d:defence-mechanism-of-human-body/v/defence-mechanism-of-human-body 2026-06-07T21:40:43.833474432Z Defence Mechanism of Human Body Defence Mechanism of Human Body Khan Academy Pakistan video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Defence Mechanism of Human Body Defence Mechanism of Human Body https://cdn.kastatic.org/ka-youtube-converted/VczdmmLZkfA.mp4/VczdmmLZkfA.mp4 161 Defence mechanism of human body https://www.khanacademy.org/science/grade-5-science-pakistan-national-curriculum/x5132c0690d5e9b7d:microorganisms-and-diseases/x5132c0690d5e9b7d:defence-mechanism-of-human-body/e/defence-mechanism-of-human-body-basic 2026-06-07T21:40:43.833474432Z Defence Mechanism of Human Body - Basic This exercise will include recall, application and multi-select questions relevant to defence mechanism of the human body. Asma Rouf exercise https://www.khanacademy.org/science/grade-5-science-pakistan-national-curriculum/x5132c0690d5e9b7d:microorganisms-and-diseases/x5132c0690d5e9b7d:defence-mechanism-of-human-body/e/defence-mechanism-of-human-body-application 2026-06-07T21:40:43.833474432Z Defence Mechanism of Human Body - Application This exercise include application questions regarding defense mechanism of the body. Asma Rouf exercise