Question : Describe internal struction of artery and vein in short.

1.	Question : Describe internal struction of artery and vein in short.
Answer» Solution :Blood is circulated in definite pathway by blood VESSELS - Arteries and VEINS. (1) Tunica Intime : It possesses squamous tissue (2) Tunica media : It possesses simple muscles and ELASTIC fibres. (3) Tunica externa : Outer layer of CONNECTIVE tissue is of collagan fibres Note : In veins, middle layer is comparatively thin.

Discussion