What catches inhaled particles in the trachea?

A. Endocardium: The endocardium is the innermost layer of the heart wall, lining the chambers and valves, and is not in contact with pericardial fluid.

B. Fibrous pericardium: This is the outermost layer of the pericardium but is not part of the heart wall. It provides protection and support but does not come into direct contact with pericardial fluid.

C. Epicardium: The epicardium is the outer layer of the heart wall and is in direct contact with pericardial fluid, which is found between the epicardium and the pericardium.

D. Myocardium: The myocardium is the middle muscular layer responsible for heart contractions and is not in contact with pericardial fluid.

A. To ensure that the uterus is securely connected to the supporting ligaments: This is not the primary function of the middle layer (myometrium); rather, the supporting ligaments provide stability to the uterus.

B. To allow the uterus to shed tissue during menstruation: This is primarily the function of the endometrium, the inner layer of the uterine wall.

C. To allow the uterus to contract during childbirth to expel the fetus: The middle layer, known as the myometrium, is composed of smooth muscle that contracts during labor to help expel the fetus.

D. To provide the uterus with adequate space to grow a fetus: While the uterine structure allows for fetal growth, the myometrium’s primary role is in contractions rather than providing space.