Thorax and Heart Anatomy Quiz

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Questions and Answers

Which nerve is primarily responsible for innervating the diaphragm?

  • Sympathetic chain
  • Phrenic nerve (correct)
  • Greater Splanchnic nerve
  • Intercostal nerve

What structure is primarily responsible for the drainage of lymph from the thoracic cavity?

  • Esophageal hiatus
  • Thoracic duct (correct)
  • Azygos vein
  • Sympathetic chain

Where does the esophagus pass through the diaphragm?

  • Aortic hiatus
  • Vena cava aperture
  • Intercostal space
  • Esophageal hiatus (correct)

Which veins are commonly associated with the drainage of the thoracic wall?

<p>Hemiazygos and accessory hemiazygos veins (A)</p> Signup and view all the answers

What anatomical structures do the trachea and bronchi primarily function to do?

<p>Conduct air (D)</p> Signup and view all the answers

Which part of the sternum is directly connected to the first rib?

<p>Manubrium (B)</p> Signup and view all the answers

What serves as the fibrous cords connecting the papillary muscles to the heart valves?

<p>Chordae tendineae (A)</p> Signup and view all the answers

Which of the following arteries is part of the left coronary artery system?

<p>Circumflex artery (C)</p> Signup and view all the answers

What is the name of the joint formed between a rib and a vertebra?

<p>Costovertebral joint (D)</p> Signup and view all the answers

Which structure is part of the mediastinum?

<p>Vagus nerve (A)</p> Signup and view all the answers

What structure prevents backflow of blood from the right ventricle to the right atrium?

<p>Tricuspid valve (D)</p> Signup and view all the answers

Which of the following veins drains blood from the heart itself?

<p>Coronary sinus (B)</p> Signup and view all the answers

What is the primary function of the myocardium?

<p>Generate heart contractions (B)</p> Signup and view all the answers

Which rib feature is characterized by a sharp bend or curve?

<p>Costal angle (D)</p> Signup and view all the answers

Which structure is primarily responsible for supplying oxygenated blood to the body?

<p>Ascending aorta (A)</p> Signup and view all the answers

Which of the following nerves is part of the sacral plexus?

<p>Pudendal n. (A), Sciatic (C)</p> Signup and view all the answers

What artery is primarily responsible for supplying blood to the ovaries?

<p>Ovarian a (B)</p> Signup and view all the answers

Which artery branches off to provide blood supply to the posterior pelvic region?

<p>Superior Gluteal a (A), Inferior Gluteal a (C)</p> Signup and view all the answers

Which structure plays a critical role in the lumbar region and contributes to nerve supply in the pelvis?

<p>Cauda Equina (D)</p> Signup and view all the answers

What is the function of the internal pudendal artery?

<p>Provides blood to the external and internal pelvic structures (A)</p> Signup and view all the answers

Which structure is not directly associated with the diaphragm?

<p>Iliac Crest (D)</p> Signup and view all the answers

Which organ is found in the lower section of the gastrointestinal tract?

<p>Cecum (B)</p> Signup and view all the answers

Which structure forms the boundary for the abdominal cavity?

<p>Diaphragm (C)</p> Signup and view all the answers

Which part of the small intestine comes after the duodenum?

<p>Jejunum (A)</p> Signup and view all the answers

What is the function of the external intercostals?

<p>Aid in inspiration (B)</p> Signup and view all the answers

Which ligaments are involved in the pelvic area?

<p>Inguinal Ligament (B)</p> Signup and view all the answers

Which part of the colon is located immediately after the ascending colon?

<p>Transverse Colon (C)</p> Signup and view all the answers

Which organ is largely responsible for detoxification in the body?

<p>Liver (D)</p> Signup and view all the answers

The major arteries supplying the abdominal organs originate from which larger artery?

<p>Abdominal aorta (D)</p> Signup and view all the answers

The internal intercostals are primarily involved in which process?

<p>Exhalation (D)</p> Signup and view all the answers

Which muscle is located in the abdominal region and aids in rotation of the torso?

<p>External Oblique (C)</p> Signup and view all the answers

What structure separates the abdominal cavity from the pelvic cavity?

<p>Pelvic inlet (A)</p> Signup and view all the answers

Which ligament is located on the ischium and connects to the sacrum?

<p>Sacrospinous ligament (D)</p> Signup and view all the answers

Which structure is primarily responsible for draining blood from the pelvis back to the heart?

<p>Inferior vena cava (D)</p> Signup and view all the answers

Which nerve is associated with the innervation of the quadriceps muscle?

<p>Femoral nerve (A)</p> Signup and view all the answers

Which of the following structures is part of the pelvic girdle?

<p>All of the above (D)</p> Signup and view all the answers

What is the primary function of the iliacus muscle?

<p>Flexion of the hip (B)</p> Signup and view all the answers

Which vessel carries oxygenated blood to the abdominal organs?

<p>All of the above (D)</p> Signup and view all the answers

Which muscle forms part of the pelvic floor and is involved in supporting pelvic organs?

<p>Levator ani (A)</p> Signup and view all the answers

The greater sciatic notch is located on which bone?

<p>Ilium (D)</p> Signup and view all the answers

Which of the following nerves is responsible for sensory innervation to the lateral thigh?

<p>Lateral femoral cutaneous nerve (A)</p> Signup and view all the answers

Which structure serves as a conduit for bile from the liver to the duodenum?

<p>Common bile duct (B)</p> Signup and view all the answers

The obturator foramen is bounded by which two bones?

<p>Pubis and ischium (A)</p> Signup and view all the answers

Which of the following structures is part of the ligamentous support of the acetabulum?

<p>Transverse acetabular ligament (A)</p> Signup and view all the answers

Flashcards

Sternum

The breastbone, a flat bone in the center of the chest

Ribs

The curved bones protecting the chest cavity

Myocardium

The muscular layer of the heart wall

Atria (atria)

The upper chambers of the heart (2)

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Ventricles

The lower chambers of the heart (2)

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Coronary arteries

Blood vessels supplying the heart muscle

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Aorta

The largest artery in the body, carrying oxygenated blood away from the heart.

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Pulmonary arteries

Carry blood from the heart to the lungs (for oxygenation)

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Vena Cava

Large veins returning deoxygenated blood to the heart.

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Costovertebral joint

Joints between ribs and vertebrae

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Esophagus

A muscular tube that connects the pharynx to the stomach.

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Thoracic Duct

The main lymphatic vessel in the thorax that drains lymph into the venous system.

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Esophageal Hiatus

Opening in the diaphragm for the esophagus to pass through.

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Vena Cava Aperture

Opening in the diaphragm for the vena cava to pass through.

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Aortic Hiatus

Opening in the diaphragm for the aorta to pass through.

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Genitofemoral Nerve

A nerve arising from the lumbar plexus. It supplies the cremaster muscle and the skin of the scrotum/labia majora.

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Cauda Equina

The collection of nerve roots at the end of the spinal cord, resembling a horse's tail. It is responsible for innervating the lower limbs and pelvic organs.

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Lumbosacral Trunk

The combined roots of the L4 and L5 spinal nerves, which merge to form part of the sacral plexus.

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Sacral Plexus

A network of nerves formed from the ventral rami of spinal nerves L4-S4. It supplies the lower limbs and pelvic structures.

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Sciatic Nerve

The largest nerve in the body, formed from the sacral plexus. It divides into the tibial and common peroneal nerves, providing motor and sensory innervation to the leg and foot.

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Iliac crest

The superior border of the ilium, forming the upper edge of the hip bone.

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Anterior superior iliac spine

A bony projection on the anterior (front) part of the iliac crest, serves as an attachment point for muscles.

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Posterior superior iliac spine

A bony projection on the posterior (back) part of the iliac crest, serves as an attachment point for muscles.

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Greater sciatic notch

A large, curved indentation on the posterior side of the ilium, allowing passage for nerves and blood vessels.

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Ischial spine

A sharp, pointed projection on the posterior aspect of the ischium, important for ligament attachments.

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Lesser sciatic notch

A smaller indentation on the posterior aspect of the ischium, allowing passage for nerves and blood vessels.

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Pubic symphysis

A cartilaginous joint that connects the left and right pubic bones in the front of the pelvis.

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Obturator foramen

A large hole in the hip bone, located between the pubis and ischium, allowing for blood vessels and nerves to pass through.

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Acetabular fossa

A small pit within the acetabulum (hip socket), filled with fat and cartilage.

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Anterior sacral foramen

Openings on the anterior (front) surface of the sacrum, allowing for the passage of nerves and blood vessels.

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Dorsal/Posterior Sacral Foramen

Openings on the dorsal (back) surface of the sacrum, allowing passage for spinal nerves.

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Sacral canal

A hollow canal running through the sacrum, containing the spinal cord.

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Sacral cornua

Two small, pointed projections at the bottom of the sacrum, serving as attachments points for ligaments.

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Inguinal ligament

A strong band of connective tissue extending from the anterior superior iliac spine to the pubic tubercle.

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Posterior sacroiliac ligaments

Strong ligaments connecting the posterior surface of the sacrum to the ilium, providing stability to the sacroiliac joint.

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Diaphragm

A dome-shaped muscle that separates the thoracic and abdominal cavities. It plays a crucial role in breathing.

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Central tendon of the diaphragm

A central, fibrous structure within the diaphragm where muscle fibers converge.

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Right and left crus of the diaphragm

Two muscular pillars arising from the lumbar vertebrae, forming the posterior part of the diaphragm.

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Pericardium

A double-layered sac that encloses the heart and helps protect it.

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External Intercostals m

Muscles running between the ribs, aiding in inspiration (inhaling) by pulling the ribs upward.

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Internal Intercostals m

Muscles running between the ribs, aiding in expiration (exhaling) by pulling the ribs downward.

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Innermost intercostals m

Deepest layer of intercostal muscles, with a similar function to internal intercostals.

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Transverse thoracis m

A muscle located on the inner surface of the chest, aiding in expiration.

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Ilium

The largest and uppermost bone of the pelvis.

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Study Notes

Unit 1: Thorax - Osteology

  • Sternum: Comprised of the manubrium, body, and xiphoid process
  • Ribs: Have a head, neck, shaft (body), costal angle, costal tubercle, and superior/inferior costal facets.
  • Articulations: Key joints include xiphosternal, costovertebral, costotransverse, and sternoclavicular.

Heart

  • Myocardium: The muscular tissue of the heart
  • Atria: The right and left atria receive blood
  • Ventricles: The right and left ventricles pump blood
  • Valves: Tricuspid (right AV), bicuspid/mitral (left AV), pulmonary, and aortic valves
  • Chordae tendineae: Tendinous cords that anchor the heart valves
  • Papillary muscles: Muscles that anchor the chordae tendineae
  • Fossa Ovalis: A depression in the interatrial septum, seen in the fetal heart

Vasculature

  • Coronary arteries: Supply blood to the heart muscle
  • Left Coronary Artery: Includes circumflex artery and anterior interventricular artery
  • Right Coronary Artery: Includes posterior interventricular artery
  • Great cardiac vein, middle cardiac vein, small cardiac veins: Drains blood from the heart.
  • Right and left superior/ inferior pulmonary veins: Drains blood from lungs to the heart
  • Superior and inferior vena cava: Drain deoxygenated blood from the body into the right atrium
  • Branches of the aorta: include Celiac Trunk, Superior mesenteric, Middle suprarenal, Renal, Gonadal, Inferior mesenteric, Common/External/Internal Iliac arteries
  • Vena Cava: include Superior and Inferior Vena Cava
  • Portal vein: Important in liver function

Mediastinum

  • Major Structures: Vagus nerve, recurrent laryngeal nerve, phrenic nerve
  • Other structures includes: Intercostal nerves, sympathetic chain, ganglia, greater splanchnic nerve, thoracic duct, azygos, hemiazygos, and accessory hemiazygos veins
  • Esophagus: Food pipe, a hollow organ that receives food from the pharynx
  • **Vena cava aperture:**Opening for vena cava
  • Esophageal hiatus: Opening for the esophagus

Lungs

  • Trachea: Windpipe, connecting the pharynx to the lungs.
  • Primary/secondary bronchi: Branches of the trachea leading to the lungs.
  • Lobes: Lungs are divided into lobes (right lung has three lobes; left lung has two lobes).
  • Other structures: radiate ligament, lateral/superior costotransverse, diaphragm, central tendon, right and left crus, pericardium, external/internal/innermost intercostals m, transverse thoracis m

Unit 2: Abdomen - Osteology & Ligaments

  • Ilium: Hip bone, important bone in the pelvic girdle
  • Anterior Superior Iliac Spine
  • Iliac Crest: Upper margin of the ilium
  • Iliac tubercle: A projection
  • Inguinal ligament: Extending downward from the ASIS
  • Esophagus ligament , Stomach, Small intestine , Duodenum, Jejunum, Cecum, Ileum, Appendix, Large Intestine, Ascending Colon, Transverse Colon are listed as organs of the abdomen.

Unit 2: Abdomen - Vasculature

  • Abdominal aorta
  • Celiac Trunk
  • Superior Mesenteric artery
  • Middle Suprarenal artery
  • Renal artery and vein
  • Gonadal artery and vein
  • Inferior Mesenteric artery
  • Common iliac artery and vein
  • External/Internal iliac artery and vein
  • Inferior vena cava
  • Portal vein

Unit 2: Abdomen - Other

  • Descending Colon
  • Sigmoid Colon
  • Rectum
  • Liver
  • Gallbladder
  • Pancreas
  • Spleen
  • Kidney
  • Suprarenal/Adrenal glands
  • Bladder,

Unit 3: Pelvis - Osteology

  • Inominate: Hip bone comprised of ilium, ischium, and pubis
  • Ilium: Major portion of hip bone
  • Iliac crest: Upper curved edge of ilium
  • Auricular surface: Surface where ilium joins the sacrum
  • External/internal lip of iliac crest
  • Tubercle of iliac crest
  • Anterior superior iliac spine
  • Anterior inferior iliac spine
  • Posterior superior iliac spine
  • Posterior inferior iliac spine
  • Greater sciatic notch
  • Ischium: Posterior portion of the hip bone
  • Ischial spine
  • Lesser sciatic notch
  • Pubis: Anterior portion of hip bone
  • Inferior pubic ramus
  • Superior pubic ramus
  • Pubic tubercle
  • Pubic symphysis
  • Pecten pubis

Unit 3: Pelvis - Other structures and Ligaments

  • Obturator Foramen: Opening in the hip bone
  • Acetabular fossa: Part of the acetabulum in the hip
  • Arcuate line
  • Acetabular notch
  • Sacrum: triangular bone in the posterior pelvis
  • Anterior sacral foramen
  • Apex of Sacrum
  • Auricular surface
  • Dorsal/Posterior Sacral Foramen
  • Intermediate sacral crest
  • Lateral Sacral Crest
  • Median Sacral Crest
  • Lumbosacral articular surface
  • Sacral canal
  • Sacral cornua
  • Superior articular facet
  • Superior articular process
  • Inguinal ligament
  • Posterior sacroiliac ligaments
  • Sacrotuberous ligament

Muscles

  • Various muscles of the pelvic and abdominal regions are listed.

Nerves

  • Specific nerves associated with the pelvic, abdominal, and or thoracic region.

Vasculature

  • Specific arteries and veins related to the pelvic and/or abdominal region.

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