Cardiovascular System L-5 Special Circulations, hemorrhage and shock. Dr Than Kyaw March 2012. Special circulation (Coronary, Pulmonary, and Cerebral circulations). Introduction. Special attention to circulation in coronary , pulmonary and brain
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Dr Than Kyaw
(Coronary, Pulmonary, and Cerebral circulations)Introduction
Alveolar type I cells.Squamous cells, as thin as 0.05 m; 95% of the alveolar epithelial surface.
Alveolar type II cells. Irregular, cuboidal shaped; cytoplasm contains a large number of granules (cytosomes) which secrete pulmonary surfactant (a mixture of proteins and phospholipids which reduce the surface tension of the alveoli, and prevent their collapse during exhalation, and act as a bactericide)
The BBB has several important functions:
Inadequate peripheral perfusion leading to failure of tissue oxygenation
Inadequate cellular O2 delivery
Inadequate energy production
Lactic acid production
- Inadequate delivery of oxygen and nutrients to maintain normal tissue and cellular function
(1) Compensatory: body try to maintain normal function
(2) Progressive stage: body mechanism used up and blood started shuntting blood from extremities to vital organs
(3) Irreversible stage- blood shunted from blood vessels and unable to sustain the pressure need to feed the heart and brain.
END OF LECTURE
Title: Role of pancreas in digestion
Submission date: 26 March 2012
Date and time: 12/3/2012 10:00 AM to 11:00 AM
Time allowed: 1 hour
Question types: Multiple choice and short questions
Reading: Both theory and practical