What increases the surface area in the stomach?

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.

A. Superior vena cava: The superior vena cava carries deoxygenated blood back to the heart, and pressure here is low.

B. Ascending aorta: The ascending aorta is where blood is ejected from the left ventricle, leading to the highest pressure in the circulatory system.

C. Abdominal aorta: While the pressure is still high in the abdominal aorta, it is lower compared to the ascending aorta.

D. Pulmonary trunk: The pulmonary trunk carries blood to the lungs, and the pressure is lower compared to the systemic circulation.