Answer:
8: Superior vena cava
13: Aorta
11: Pulmonary valve
10: Left Pulmonary veins
9: Right atrium
12: Left atrium
7: Tricuspid Valve
6:Right ventricle
5: ?
3:Bicuspid valve
4:Chordae tendineae
2:Papillary muscle
1: Interventricular septum
Explanation:
Sorry if it's not right
Answer:
A
Explanation:
Muscles get 'tired' due to lactic acid fermentation, which happens anaerobically. So, if there is oxygen, aerobic respiration will take priority and your muscles won't get tired
Allergy meds is not considered a pain killer.