Answer:
Veins are blood vessels in humans, and most other animals that carry blood towards the heart. Most veins carry deoxygenated blood from the tissues back to the heart; exceptions are the pulmonary and umbilical veins, both of which carry oxygenated blood to the heart. In contrast to veins, arteries carry blood away from the heart.
Explanation:
Answer:
<em>Kreb cycle occurs in mitochondrial matrix and electron transport system occurs in the inner membrane of mitochondria.</em>
Answer:
slower
Explanation:
winter days shorter farther from the sun causes stuff