Semilunar valves prevent backflow into the ___________________________; mitral and tricuspid valves prevent backflow into the ________________________________. Using your own observations, explain how the operation of the semilunar valves differs from that of the atrioventricular valves.

Add the following terms to the photograph of cardiac muscle below.
a. intercalated disc b. nucleus of cardiac fiber c. striations d. cardiac muscle fiber
Describe the unique anatomical features of cardiac muscle. What role does the unique structure of cardiac muscle play in its function?

During the sheep heart dissection, you were asked initially to identify the right and left ventricles without cutting into the heart. During this procedure, what differences did you observe between the two chambers?___________________
When you measured thickness of ventricular walls, was the right or left ventricle thicker?
Knowing that structure and function are related, how would you say this structural difference reflects the relative functions of these two heart chambers?

Which heart valve is between the left atrium and left ventricle?

a. Tricuspid

b. Bicuspid

c. Pulmonary semilunar

d. Aortic semilunar

e. Right atrioventricular

Blood leaves the left ventricle by passing through the (a) aortic semilunar valve. (b) pulmonary semilunar valve. (c) mitral valve. (d) tricuspid valve.

The superior vena cava delivers oxygenated blood from the head, neck, upper limbs, and chest to the right atrium (T/F), while the inferior vena cava delivers deoxygenated blood from the trunk and lower limbs to the right atrium (T/F).

A) false; true

B) true; true

C) true; false

D) false; false

Blood returning to the heart via the inferior vena cava and the superior vena cava collects in the _______. A. left ventricle, B. right ventricle, C. right atrium, D. lett atrium.

Name the three vessels that deliver oxygen-poor blood to the right atrium.

Which valves are anchored by chordae tendineae?

systemic circulation, pulmonary circulation

New studies by Federal Highway Administration traffic engineers suggest that speed limits on many thoroughfares are set arbitrarily and often are artificially low. According to traffic engineers, the ideal limit should be the "85th percentile speed." This means the speed at or below which 85 percent of the traffic moves. Assuming speeds are normally distributed, find the 85th percentile speed for roads with the following conditions. The mean speed is 52 mph with a standard deviation of 8 mph.

Dianne Love was admitted to the hospital complaining of respiratory problems and left-sided lower abdominal pain. The physician has reviewed Ms. Love's CBC, WBC, ESR, PTT, and PT. Ms. Love was found to be anemic. The physician has ordered 2 units of O negative blood.

Explain to Ms. Love the reason why each laboratory test was ordered and how she was determined to be anemic.

Choose the appropriate meaning of abbreviations to fill in the patient documentation.

Orders for this patient's preop testing before her surgery will include a $\rule{4cm}{0.15mm}$ (PT) and an $\rule{4cm}{0.15mm}$ (aPTT).

The physician has ordered the following diagnostic tests for the patient:

• CBC

• WBC

• ESR

• PT

• PTT

Using terms the patient can understand, explain to the patient what each of these abbreviations means.