The blood returned to the heart in the right atrium from different parts of the body is deoxygenated, which is transferred to the right ventricle to be pumped to the lungs by the pulmonary artery for removal of the carbon dioxide and oxygenate again the blood.
The right ventricle chamber of the heart pumps back blood to the lungs to take up oxygen. The left part of the heart gets the oxygen rich blood from the lungs and pumps it to all parts of the body.
"It is the enzyme that breaks down acetylcholine in the synaptic cleft, ending stimulation of the muscle fiber. -It is the type of receptor found in the motor end plate that binds acetylcholine, initiating an electrical impulse."
If the bill is counterfeit and the paper is wood-based, the iodine in the pen solution will react with the starch and leave a dark brown or black mark.
The bone indicated by the arrow is femur bone. It should be classified as the long bone. Other example for long bones would be tibia and fibula. Short bone would be carpal or tarsal bones. Flat bone could be found in skull. Irregular bone would be the vertebrae or pelvic.