Directions: Write True if the statement is correct and False if it is not correct. Write your answer on the answer sheet.
1. Friction is a force that pulls object downward.
2. Friction is a force that resists motion.
3. We must use extra force to start the motion of stationary
objects.
4. Static friction does not allow an object to move.
5. Kinetic energy allows an object to move.​

1- False

2- True

3-True

4- False

5-True

the oxygenated blood then leaves the lungs through pulmonary veins, which return it to the left heart, completing the pulmonary cycle. this blood then enters the left atrium, which pumps it through the mitral valve into the left ventricle. from the left ventricle, the blood passes through the aortic valve to the aorta.

deoxygenated blood leaves through the right ventricle through the pulmonary artery. from the right atrium, the blood is pumped through the tricuspid valve (or right atrioventricular valve), into the right ventricle.

answer : haversian

[explanation: -(compact bone is organized as parallel columns, known as haversian systems, which run lengthwise down the axis of long bones. these columns are composed of lamellae, concentric rings of bone, surrounding a central channel, or haversian canal, that contains the nerves, blood vessels, and lymphatic system of the bone)]