BIO310H5 Lecture Notes - Lecture 18: Lymphatic Vessel, Varicose Veins, Capillary Pressure

• School: UTM
• Department: Biology
• Course: BIO310H5
• Professor: Nagham Abdalahad

Document Summary

As we go from arterial to venous, we"re decreasing bp: the more the pressure, the more the filtration. This is why we don"t have filtration at venous side (it will. Venous capillaries aren"t always able to reabsorb the filtrate. The lymphatic system helps interstitial fluid go back to the blood. Some organs produce materials that need to be reabsorbed. Some of these substances cannot reabsorbed back into the blood, but the lymphatic system. Function: return excess fluid/proteins to the blood, transport lipids from gi tract to circulatory system, immune response. Lymphatic vessels: start as blind tubes connected with each other to form larger lymph vessels, which then mix into veins (blood). Lymph vessels are filers: for bacteria, for cancer cells etc. Ex; if you have breast cancer the first metastasis is in lymph nodes. Cancer cells easily travel thru lymphatic capillaries into the lymph nodes, but this defense is good until a limit.