Anatomy Exam 4
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what percent of the blood is erythrocytes?
what are erythrocytes?
red blood cells
what percent of the blood is plasma?
what percent of the blood is leukocytes and platelets?
what are leukocytes?
white blood cells
what kind of tissue is endothelium made of?
what kind of tissue is internal elastic made of?
multiple layers of smooth muscle
what kind of tissue is tunica interna made of?
smooth muscle and connective tissue
what kind of tissue is tunica media made of?
what kind of tissue is tunica externa made of?
areolar connective tissue
compare the sizes of tunica media from largest to smallest?
venule, elastic artery, arteriole, vein, muscular artery
- elastic artery-largest (1-2.5cm)
- muscular artery-medium (3mm-1cm)
- arteriole- smallest ( 3microm-3mm)
- vein-largest vein (>100 microm)
- venule- smallest vein (<100 microm)
which is pressure/volume reservoir?
artery vs vein
- vein-volume (60% of blood volume)
how does skeletal muscle pump return blood to heart?
how does respiratory pump return blood to heart?
when the skeletal muscles contract, veins are squeezed to move blood towards the heart
venous return-when we inhale, the diaphragm flattens/contracts, pressure increases, causing thoracic cavity to increase in volume with lower pressure. During exhalation, the opposite happens pushing blood from thoracic cavity to the heart.
artery/arteries that supply arm (upper)
artery/arteries that supply diaphragm
descending abdominal aorta-inferior phrenic a
artery/arteries that supply stomach, spleen, and liver
- abdominal aorta- celiac trunk-
- left gastric, splenic, common hepatic
artery/arteries that supply small intestine
abdominal aorta-superior mesenteric a
artery/arteries that supply adrenal glands and kidneys
abdominal-suprarenal and renal
artery/arteries that supply external genitalia
internal iliac artery
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