Answer:
c. inner cell mass
Explanation:
The inner cell mass of the blastocyst forms the embryo while the outer layer, the trophoblast forms the placenta.
Answer:
Explanation:
Left coronary artery - divides into two branches (the circumflex artery and the left anterior descending artery). Left anterior descending artery (LAD) - supplies blood to the front and bottom of the left ventricle and the front of the septum. Pulmonary veins - bring oxygen-rich blood back to the heart from the lungs.
<h2>Question ❓: Briefly explain the nerve processes involved in an animal reacting to pain.</h2>
<h2>Answer❄️:</h2>
In the wild, hurt animals nurse their wounds, make noises to show distress, and even become reclusive. In the lab, researchers found that animals, like chickens and rats, self-administer pain relievers (from special machines set up for tests) when they're hurting.
Low energy and a pain without a clear cause
