The heart is enclosed in a double-walled sac called the:
a. apex b. mediastinum c. pericardium d. thorax

What are anatomy and physiology?

Which of the following terms describes the sac in which the heart is enclosed?

A. myocardium

B. endocardium

C. pericardium

D. epithelium

The base of the heart (a) is its posterior surface, (b) lies on the diaphragm, (c) is the same as its apex, (d) is its superior border

The fluid-filled, double-walled sac that surrounds the heart is called the _______. A. pericardium, B. endocardium, C. myocardium, D. epicardium.

Most inspired particles such as dust fail to reach the lungs because of the:

a. ciliated mucous lining in the nose.

b. abundant blood supply to the nasal mucosa.

c. porous structure of turbinate bones.

d. action of the epiglottis.

intercalated discs found in cardiac muscle tissue are

Match the accessory skin organs to their functions.

Choose one of the accessory skin organs and describe its functions.

a. Accessory skin organ: $\rule{9cm}{0.15mm}$

b. Functions: $\rule{10cm}{0.15mm}$

Select the letter of the choice that best completes the statement. The muscle layer of the heart is called the: (a.) myocardium (b.) endocardium (c.) pericardium (d.) pleural lining

The bulk of the heart wall is

a. epicardium.

b. pericardium.

c. myocardium.

d. endocardium.

e. exocardium.

Which layer of the heart wall is an endothelium? a. Endocardium, b. Myocardium, c. Epicardium, d. Pericardium.

Which part of the heart wall is the thickest?

a. the pericardium

b. the epicardium

c. the myocardium

d. the endocardium

Surgical thoracoscopy with excision of pericardial tumor?

Which of the following is not typical of leukocytes? a. Amoeboid movement, b. Phagocytic (some), c. Nucleated cells, d. The most numerous cells in the bloodstream.