The third level, secondary consumers.
Answer:
Brain
Explanation:
The brain has nerve endings that responds to stimulations such as sensory stimulations
Answer: they have to maintain homeostasis, so they remove waste to do so..
In fetal circulation, the ductus venosus bypasses the liver and the ductus arteriousus bypasses the lungs. Ductus arteriosus also called ductus botalli is a blood vessel connecting the main pulmonary artery to the proximal ascending aorta. It does allow most of the blood from right ventricle to bypass the fetus's fluid-filled non-functioning lungs. Ductus venosus on the hand allows oxygenated blood from the placenta to bypass the liver.
