In humans, which blood vessels carry oxygen-rich blood away from the heart to all the body parts?

Correct option is D

Correct Answer: (d) Arteries

Explanation:

• Arteries are the blood vessels that carry oxygen-rich (oxygenated) blood away from the heart to all body parts.
• The only exception is the pulmonary artery, which carries deoxygenated blood to the lungs — an important exam point.

Information Booster:

• Arteries have thick, elastic walls to withstand high pressure from the pumping heart.
• Main artery: Aorta, the largest artery in the human body.
• Oxygenated blood flows from:
  Heart → Arteries → Arterioles → Capillaries (where exchange occurs)

Additional Knowledge:

• Capillaries (a): Microscopic vessels where exchange of gases, nutrients, and wastes occurs.
• Venules (b): Small vessels that collect deoxygenated blood from capillaries and carry it into veins.
• Veins (c): Carry deoxygenated blood toward the heart (except pulmonary vein, which carries oxygenated blood from lungs to heart).