The function of the medulla, or the medulla oblongata is to control all the involuntary movements in the body. This includes things both serious and not so serious things, ranging from controling our breath and heart blood pumping, to simpler yet important things like blinking. If we don't control it wilfully, it's done by the medulla.

3 0

3 years ago

Lumen

faust18 [17]

Answer:

Lumen corresponds to the central opening of a vessel (option d).

Explanation:

From the biological point of view, lumen is the internal space of any structure or tubular organ, whose purpose is the conduction of substances through it.

In the case of blood vessels, the lumen is a central space covered by a simple epithelium, called the endothelium, which ensures the passage of blood in a fluid form.

The other options do not correspond to the answer:

a. Vessel that empties into the right atrium is the vena cava

b. Fibrous sac around the heart is the pericardium.

c. Structure that keeps fluid moving forward, it is a blood vessel.

e. Lower, pointed region of the heart, corresponds to the cardiac apex.

7 0

4 years ago