That body parts are called "Homologous Organs" which are similar in origin & structure.
Hope this helps!
Answer: Possession of Valves
Explanation: Veins possess valves which ensures that blood flows in only one direction. Valves helps blood to flow back to the heart against gravitational force.
Arteries don't have valves because the pressure originating from the heart is capable of causing the blood to flow in one direction.
Could you attach the statements so i can answer :)
1st one, fats/phospholipids/steroids.
2nd one, cholesterol and saturated fats.
