NPB 113 Lecture Notes - Lecture 10: Skull, Fast Fourier Transform, Neutrophil
3 Apr 2021
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Document Summary
" velocity of blood flow is slow to allow exchange. " continuous capillary : no pores ( fenestra ) in the walls. Found in the brain , reproductive tissues ( testis ) L transporter required extremely well - regulated transport. " h2o and h2o - soluble molecules can easily cross. Large proteins do not cross (cid:8869) maintains osmotic pressure within the capillary. Allows large particles , proteins , and cells to cross. Found in liver , spleen , bone marrow. Venules ( - 10 - 50mm in diameter) Smooth muscle ( tunica media ) present. Low elasticity ( no elastin present ) " geometric change allows large t volume without large t pressure. Need to maintain low pressure so blood can flow from capillaries veins pressure high compliance. Venous smooth muscle can contract to decrease compliance ( wall stiffens ) Increasing volume t blood pressure (cid:8869) facilitates venous return of blood back to heart.
