Lab 3.Lab 3 Human ECG.pdf Page 1 of 16 Lab 3.Lab 3 Human ECG.pdf
Lab 3: Human ECG
Circulatory System
Arteries carry blood away from
the heart
Veins carry blood toward the
heart
The circulatory system:
- supplies tissues in the body with oxygen and other nutrients
- transports hormones
- removes unnecessary waste products
Histology of the arteries and veins - Arteries have thicker walls than veins because they receive
blood from the heart with greater pressure. Arteries Veins
Lab 3.Lab 3 Human ECG.pdf Lab 3.Lab 3 Human ECG.pdf 2026/2027
,Lab 3.Lab 3 Human ECG.pdf Page 2 of 16 Lab 3.Lab 3 Human ECG.pdf
- Veins have a larger lumen than Arteries
- Arteries have a thicker smooth muscle/ collagen wall than veins
- The lumen of arteries is a more rounded appearance in cross-section
Major Arteries
3 main branches off the aortic arch:
- brachiocephalic trunk
- left common carotid artery
- left subclavian artery
Major Arteries
Descending Aorta
- descending thoracic aorta (above the diaphragm)
- descending abdominal aorta (below the diaphragm)
In between thoracic descending aorta and abdominal descending aorta 3 branches of artery
emerge (supplies gastrointestinal tract):
- Celiac trunk (stomach, duodenum, liver and spleen)
Lab 3.Lab 3 Human ECG.pdf Lab 3.Lab 3 Human ECG.pdf 2026/2027
, Lab 3.Lab 3 Human ECG.pdf Page 3 of 16 Lab 3.Lab 3 Human ECG.pdf
- Superior mesenteric artery (small intestine, pancreas, proximal large intestine)
- Inferior mesenteric artery (large intestine)
Major veins – upper body - Veins merge into larger branches and drain blood from tissues
In upper body, these veins merge into the superior vena cava:
- Brachiocephalic veins
- Internal jugular vein (head and neck)
- Subclavian vein (clavicle)
- Axillary vein (armpit)
- Brachial vein (humerus)
Lab 3.Lab 3 Human ECG.pdf Lab 3.Lab 3 Human ECG.pdf 2026/2027
Lab 3: Human ECG
Circulatory System
Arteries carry blood away from
the heart
Veins carry blood toward the
heart
The circulatory system:
- supplies tissues in the body with oxygen and other nutrients
- transports hormones
- removes unnecessary waste products
Histology of the arteries and veins - Arteries have thicker walls than veins because they receive
blood from the heart with greater pressure. Arteries Veins
Lab 3.Lab 3 Human ECG.pdf Lab 3.Lab 3 Human ECG.pdf 2026/2027
,Lab 3.Lab 3 Human ECG.pdf Page 2 of 16 Lab 3.Lab 3 Human ECG.pdf
- Veins have a larger lumen than Arteries
- Arteries have a thicker smooth muscle/ collagen wall than veins
- The lumen of arteries is a more rounded appearance in cross-section
Major Arteries
3 main branches off the aortic arch:
- brachiocephalic trunk
- left common carotid artery
- left subclavian artery
Major Arteries
Descending Aorta
- descending thoracic aorta (above the diaphragm)
- descending abdominal aorta (below the diaphragm)
In between thoracic descending aorta and abdominal descending aorta 3 branches of artery
emerge (supplies gastrointestinal tract):
- Celiac trunk (stomach, duodenum, liver and spleen)
Lab 3.Lab 3 Human ECG.pdf Lab 3.Lab 3 Human ECG.pdf 2026/2027
, Lab 3.Lab 3 Human ECG.pdf Page 3 of 16 Lab 3.Lab 3 Human ECG.pdf
- Superior mesenteric artery (small intestine, pancreas, proximal large intestine)
- Inferior mesenteric artery (large intestine)
Major veins – upper body - Veins merge into larger branches and drain blood from tissues
In upper body, these veins merge into the superior vena cava:
- Brachiocephalic veins
- Internal jugular vein (head and neck)
- Subclavian vein (clavicle)
- Axillary vein (armpit)
- Brachial vein (humerus)
Lab 3.Lab 3 Human ECG.pdf Lab 3.Lab 3 Human ECG.pdf 2026/2027
