Which of the following lines the inside of the heart chambers and makes up heart valves?

• endocardium

• myocardium

• pericardium

• epicardium

What is the best description for the location of the heart?

• in the mediastinum

• in the cranium

• in the ribs

• in the chest

Which of the following is true?

• superior vena cava returns blood from the upper body, inferior vena cava returns blood from the lower body

• superior vena cava returns blood from the upper body, inferior vena cava returns blood from the lungs

• superior vena cava returns blood from lungs, inferior vena cava reurns blood from the liver

• superior vena cava returns blood from the lower body, inferior vena cava returns blood from the upper body

Name the thick outer layer of the heart that protects and separates it from the rest of the chest cavity.

• pericardium

• endocardium

• mycardium

• epicardium

The coronary arteries send blood directly to

• the brain (neurons)

• the liver (hepatic tissue)

• the heart muscle (myocardium)

• the pancreas (islets of langerhans)

Compare the Coronary Arteries to the Aorta in terms of size of lumen?

• the Aorta is wide (1 inch) the Coronary artery is narrow (1/8 inch)

• the Aorta is narrow (1/8 inch) the Coronary artery is wide (1 inch)

• the Aorta is wide (1 inch) the Coronary artery is wide (1 inch)

• the Aorta is narrow (1/8 inch) the Coronary artery is narrow (1/8 inch)

When electrical stimulation hits _____________________ the heart contracts.

• myocardium

• endocardium

• pericardium

• epicardium

Unlike skeletal mucle tissue which is also striated, cardiac muscle is branched. What does this allow?

• contraction of the entire heart in a coordinated way

• contraction of the heart in one direction

• contraction of the heart all at once

• contraction of the heart from side to side

Which part starts the first step in the electrical conduction system?

• sinoatrial node

• AV node

• AV Bundle branches

• Purkinge fibers

Which part would be second in the electrical conduction system?

• sinoatrial node

• AV node

• AV Bundle branches

• Purkinge fibers