<Tr> <Th_colspan="2"> Pulmonary alveolus </Th> </Tr> <Tr> <Td_colspan="2"> The alveoli </Td> </Tr> <Tr> <Th_colspan="2"> Details </Th> </Tr> <Tr> <Th> System </Th> <Td> Respiratory system </Td> </Tr>

Name and describe the cell types in the alveolus and their functions