Question

Answer to the question ​

Answer 1

Answer:

lumen of arteryis smaller than vein because blood glows with great pressure and force as it is direvtly pumped from heart to withstand this high pressure it has narrow lumen which in other words artery has thick wall than vein

Explanation:

in vein blood flows with low pressure and force sothat ot has broard lummen or say thin cellular wall HOPE IT HELPED YOU IF SO PLEASE MARK IT AS BRAINLIEST

Answer 2

Answer:

Option is 2

Explanation:

1)Heart of fish pumps OXYGENATED blood to body parts..

2)All reptile have 2 chambered heart except CROCODILE.

3)Pulmonary artery send impure blood to lungs and pulmonary artery brings pure blood to heart.

4)Lumen of arteries are narrower than the lumen of vein because the the arteries has the nature of elastic so that no matter how strong heart pumps the blood arteries make sure that they resist the flow.

HOPE YOU UNDERSTAND!!

THANK YOU..!