Question

All of the following are correctly matched EXCEPT:

a. Myocardium - heart muscle; makes up the bulk of the heart; pumping action
b. Visceral pericardium - also known as epicardium; adheres tightly to heart
c. Endocardium - forms heart valves; continuous with endothelium
d. Pericardial cavity - space that houses the heart and lungs
e. Fibrous pericardium - prevents overstretching of the heart, anchors the heart in the mediastinum

Answer 1

The correct match is option d. Endocardium does not form heart valves. The myocardium is the middle layer responsible for the heart's pumping action, while the epicardium adheres tightly to the heart. The pericardial cavity houses the heart and lungs.

Step-by-step explanation:

The correct match is option d. Endocardium does not form heart valves; instead, it lines the heart chambers and covers the heart valves.

The myocardium is the middle layer of the heart wall and consists of cardiac muscle cells that make up the bulk of the heart, responsible for its pumping action. The innermost layer of the heart wall is the endocardium, which lines the chambers where blood circulates and covers the heart valves.

The visceral pericardium, also known as the epicardium, adheres tightly to the heart and is the outer layer of the heart wall. The pericardial cavity is the space that houses the heart and lungs, and the fibrous pericardium prevents overstretching of the heart and anchors it in the mediastinum.