Hepatic Portal Circulation

Hepatic portal circulation consists of veins that drain blood from the intestines, stomach, spleen, pancreas, and gallbladder and empty into the hepatic portal vein which directs blood to the liver. The hepatic portal vein is formed by the union of the superior mesenteric vein and the splenic vein. The superior mesenteric vein drains the small intestine and portions of the large intestine and stomach. The splenic vein drains the spleen and also receives blood from the stomach (by way of the gastric, pyloric, and gastroepiploic veins), pancreas (by way of the pancreatic veins), and portions of the colon (by way of the inferior mesenteric vein). The blood, after traveling through the liver, enters the hepatic veins which empty into the inferior vena cava.

Exercise 28.1

Figure 28.1 show the arteries of the human. Using your textbook as a guide, fill in the labels on the figure.

Figure 28.2 show the veins of the human. Using your textbook as a guide, fill in the labels on the figure.

Exercise 28.2

As directed by your instructor, study the arteries and veins on a preserved cat. The locations given above for the human also apply to the cat with two exceptions. The first exception is that the aortic arch has only two arteries: the left subclavian artery and the innominate artery. The innominate artery branches to form the left and right common carotid arteries and the right subclavian artery. The second exception is that the cat does not have a common iliac artery. The internal and external iliac arteries branch off the abdominal aorta.

Identify the following arteries on the cat: abdominal aorta, adrenolumbar artery, aortic arch, ascending aorta, axillary artery, brachial artery, celiac artery, deep femoral artery, descending aorta, external iliac artery, femoral artery, iliolumbar artery, inferior mesenteric artery, innominate artery, internal iliac artery, left common carotid artery, left subclavian artery, pulmonary artery, renal artery, right subclavian artery, right common carotid artery, spermatic or ovarian artery, superior mesenteric artery, and thoracic aorta.

Identify the following veins on the cat: adrenolumbar vein, axillary vein, azygos vein, brachial vein, common iliac vein, deep femoral vein, external iliac vein, external jugular vein, femoral vein, gastrosplenic vein, hepatic portal vein, iliolumbar vein, inferior vena cava, inferior mesenteric vein, innominate vein, internal iliac vein, internal jugular vein, renal vein, spermatic or ovarian vein, subclavian vein, superior vena cava, superior mesenteric vein, and transverse jugular vein.

Exercise 28.3

Examine a prepared microscope slide of a cross section of an artery and vein. Be able to identify an artery and a vein.

Deep Femoral Vein Cat
Artery Vein

Exercise 28.4

Identify the following vessels on the model of the arm: axilliary artery, brachial artery, median artery, radial artery, ulnar artery.

Identify the following vessels on the model of the leg: anterior tibial artery, deep femoral artery, external iliac artery, external iliac vein, femoral artery, femoral vein, internal iliac artery, popliteal artery, and posterior tibial artery.

right common carotid a. external jugular v. right subclavian a.

superior vena cava right common carotid a. external jugular v. right subclavian a.

superior vena cava

Brachiales
axillary v. brachial v.

brachial a.

axillary a. innominate v. left subclavian a. innominate a.

arch of aorta celiac a. superior mesenteric a. inferior vena cava inferior mesenteric a.

external iliac v. femoral v.

celiac a. superior mesenteric a. inferior vena cava inferior mesenteric a.

external iliac v. femoral v.

Common Iliac Vein Named

renal v. renal a.

aorta ovarian a. iliolumbar a. iliolumbar v.

external iliac a. femoral a.

renal v. renal a.

aorta ovarian a. iliolumbar a. iliolumbar v.

external iliac a. femoral a.

Name the three arteries that originate from the aortic arch.

A vessel that takes blood away from the heart is known as a(n) (4).

Name the two veins that come together to form the subclavian vein.

The subclavian artery branches in the axilla to form the CD artery.

Name the three veins that come together to form the innominate vein.

Name the three unpaired arteries that originate from the abdominal aorta.

Name the vein that is located in the elbow area which connects the basilic vein and cephalic vein.

The longest vein in the body is the (15) vein.

CHAPTER /

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Essentials of Human Physiology

Essentials of Human Physiology

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