1. Why is the mesenteric artery significantly different length between mature males and females?
2. What is the adaptive significance of arteries in appendages being buried deeper than veins?
3. Does the hepatic portal vein carry oxygenated or deoxygenated blood?
4. Why should blood pass through the liver after leaving the digestive system and before entering the other organs?
5. Olfactory bulbs or lobes-these are responsible for the rat's ability to what ?