Both nerves to heart cut- HR 100/min Only vagi cut- HR 150-180/min
MCFP n MSFP- 7 mmHg, min 4 max 17 mm Hg, At 4L, MCFP is 0.
Pulmonary circulation- 18pc blood. Heart- 10pc blood.
Both carotid and aortic receptors cut..
BP is 200-300mmHg
Height and BP change from heart level- 0.77mmHg/cm change.
Blood loss of upto 20pc is normally tolerated by body.
Black out in g forces- Force more than 5g Cerebral perfusion pressure- 80 to 100 mm Hg
CBF- 750ml/min or 54ml/100gm/min Inc pco2 by 1 mmHg leads to increase
CBF by 3 ml/min/100gm tissue.1 degree fall in temperature- Dec.
CBF by 5-7pc 54pc blood in veins-max 4500cm2 cross section of capillaries- max Velocity of blood in aorta- 40cm/sec Normal arm to tongue circulation time is 15 seconds.
Capillary velocity- 0.07cm/sec and transit time is 1-2 seconds.
Reynolds number- Biological fluids-1000 Less than 2000- No turbulance More than 3000-
Turbulance Branching sites: more than 200-400-turbulance present.
RV Pressure-25/0 mmHg Pulmonary circulation- 25/8mm Hg Pulmonary circulation
MAP- 15mm Hg Pulmonary vascular resistance-1/10th of systemic resistance. Lungs- 450ml, 9pc of BV Capillaries- 70ml at rest to 200ml in exercise.
Bronchail arteries- 1 to 2 pc of CO Inward pressure gradient of 15 mm Hg into the capillaries keeps the alveoli dry. V/Q ratio- 0.8
Myocardial o2 consumption at rest- 2ml/100 gm/min
Myocardial o2 consumption of beating heart- 9ml/100 gm/min
Splanchnic vessels- 20 to 30 pc of BF