Chapter 11 and lab

The deepest layer of the heart wall is the __________

• myocardium
• endocardium
• pericardium
• epicardium

Which chamber of the heart pumps oxygenated blood out through the aorta to the systemic circulation?

• left ventricle
• left atrium
• right atrium
• right ventricle

Name the structure circled in green

• pulmonary semilunar valve

• left AV valve

• ventricular septum

• brachiocephalic trunk

Why is the muscle wall so much thicker in the left ventricle than the right?

• The right ventricle pumps blood to the entire body, requiring more forceful contractions.
• The right ventricle has a higher blood pressure, necessitating a thicker muscle wall.
• The left ventricle pumps blood to the entire body, requiring more forceful contractions.
• The left ventricle is smaller in size, so it needs thicker muscle wall to compensate.

How big is the heart?

• The heart is about the size of a closed fist.
• The heart is the size of a tennis ball.
• The heart is the size of a pea.
• The heart is the size of a watermelon.

What does "the heart is a double pump" mean?

• The heart has two chambers
• The heart functions as two separate pumps, one for the pulmonary circulation and one for the systemic circulation

• The heart pumps blood in two different directions
• The heart alternates pumping blood to superior body and the inferior body

What is the function of the heart valves?

• To regulate blood pressure in the body.

• To filter waste products from the blood.
• To produce red blood cells.
• To ensure one-way blood flow through the heart chambers.

Blood returns to the right atrium from the superior and inferior ________ _______

poorly oxygenated blood is pumped out of the right ventricle, through the pulmonary semilunar valve and into the pulmonary trunk. From there it travels via the __________ ________ to the lungs

Pulmonary veins carry oxygen rich blood back to the heart where it enters left atrium. It passes through the left AV valve into the _____ _____________