The pulmonary trunk and arteries are color-coded on models and in pictures, because they carry blood. the pulmonary trunk and arteries are color-coded on models and in pictures, because they carry blood. red, oxygen-poor blue, oxygen-poor blue, oxygen-rich red, oxygen-rich

Answer;

-Blue, deoxygenated

The pulmonary trunk and arteries are color-coded blue on models and in pictures, because they carry deoxygenated blood.

Explanation;

The pulmonary trunk is a major vessel of the human heart that originates from the right ventricle. It branches into the right and left pulmonary arteries, which lead to the lungs.

-While veins usually carry deoxygenated blood from tissues back to the heart, in this case, pulmonary veins are among the few veins that carry oxygenated blood instead. Oxygenated blood from the lungs is circulated back to the heart through the pulmonary veins that drain into the left atrium.

answer:   option a) glucagon was secreted by his pancreas before he ate the cookies because blood glucose was low. insulin was secreted after he ate the cookies because his blood glucose was high.

explanation: