The Living World 8th Edition by George Johnson

تمرين 8

The lymphatic system is like the circulatory system in that they both
A) have nodes that filter out pathogens.
B) are made up of arteries.
C) deliver blood to the heart.
D) carry fluids.
The lymphatic system includes all of the following except
A) lymph nodes.
B) the spleen.
C) the pancreas.
D) the thymus.
Instead of evolving an entire second open circulatory system-the lymphatic system-to collect water lost from the blood plasma during passage through the capillaries, why haven't vertebrates simply increased the level of serum albumin in their blood?