Textbook Question
The myocardium receives its blood supply directly from the:
a. Aorta
b. Coronary arteries
c. Coronary sinus
d. Pulmonary arteries
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19. The Blood Vessels
Arteries
Problem 14
Textbook Question
The paired arteries supplying blood to the body wall and other structures outside the abdominopelvic cavity include the:
a) Left gastric, hepatic, splenic, and phrenic arteries
(b) Adrenal, colic, lumbar, and gonadal arteries
(c) Iliac, femoral, and lumbar arteries
(d) Celiac, left gastric, and superior and inferior mesenteric arteries
Verified step by step guidance1
Step 1: Understand the anatomical context of the problem. The question asks about paired arteries that supply blood to the body wall and structures outside the abdominopelvic cavity. Paired arteries typically come in left and right pairs and supply bilateral structures.
Step 2: Identify which arteries are paired and which are unpaired. For example, the celiac artery and its branches (left gastric, hepatic, splenic) are generally unpaired and supply organs within the abdominopelvic cavity.
Step 3: Recognize that arteries like the adrenal, colic, lumbar, and gonadal arteries are paired and supply both the body wall and some organs outside the abdominopelvic cavity, such as the adrenal glands and body wall muscles.
Step 4: Evaluate the options by matching the arteries listed with their paired/unpaired status and their target regions. For example, iliac and femoral arteries are paired but mainly supply the lower limbs, while lumbar arteries supply the body wall.
Step 5: Conclude which group of arteries best fits the description of paired arteries supplying the body wall and structures outside the abdominopelvic cavity based on their anatomical distribution and pairing.
Verified video answer for a similar problem:This video solution was recommended by our tutors as helpful for the problem above
Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Paired vs. Unpaired Arteries
Paired arteries occur as symmetrical pairs on both sides of the body, supplying structures like the body wall and paired organs. Unpaired arteries, in contrast, are single vessels supplying midline or unpaired organs. Understanding this distinction helps identify which arteries supply the body wall versus internal organs.
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Subcategories of Arteries
Arterial Supply to the Body Wall
The body wall receives blood primarily from paired arteries such as lumbar, adrenal, and gonadal arteries. These arteries branch from the abdominal aorta and supply muscles, skin, and other structures outside the abdominopelvic cavity, unlike visceral arteries that supply internal organs.
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Classification of Abdominal Arteries
Abdominal arteries are classified as paired or unpaired based on their origin and target structures. For example, the celiac, superior, and inferior mesenteric arteries are unpaired and supply digestive organs, while arteries like lumbar and gonadal are paired and supply the body wall and paired organs.
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