What are the roles of an Alveolus of lung, Large artery, Peripheral nerve and Skeletal muscle?

Question

can someone please help me. websites will be useful.

Answer 1

Alveolus of lungs is a functional unit transferring oxygen to blood and carbon di oxide out of it. Large artery branches into smaller arteries,arterioles and capillaries .Peripheral nerve carries impulses to target organs or from organs to central nervous system. Skeletal muscle moves bones and joints.