Answer:
a. in the bottom of the atrium just above the ventricles
Explanation:
AV node -
It helps to control the heart rate , it serves as an electrical relay station , reduces the electrical current which is sent by the SA node .
The location of the AV node , is at the lower back section of the inter atrial septum , and conducts the electrical impulse normally from the atria to ventricles .
Answer:
diaphragm
The diaphragm is a C-shaped structure of muscle and fibrous tissue that separates the thoracic cavity from the abdomen. The dome curves upwards.
Explanation:
Answer:
FDA approves Pfizer booster shots for people who are 'high risk' or over 65. The US Food and Drug Administration on Wednesday authorized a booster dose of the Pfizer and BioNTech Covd-19 vaccine for those ages 65 and older and some high-risk Americans, paving the way for a quick rollout of the shots.
Explanation:
Answer:
B. eating increases the amount of oxygen available during exercise
