PHYSL210A Lecture Notes - Lecture 10: Buffy Coat, Hemostasis, Hematocrit
1 May 2019
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Document Summary
Hormones, o2 and nutrients diffuse to the cells all clustered together in eukaryotes. How do all these cells interact and maintain homeostasis. Blood: fluid connective tissue that is helping to communicate with different cells in different part of the body. Blood is contained in blood vessels, but sometimes some components of the blood can move out to tissues. Blood is denser than water because of its cellular components: blood stored on a tube will sediment its cells when left for longer or centrifuge it. Plasma is the main supporting system and all the cells are suspended on plasma. Transports gas, nutrients, hormones, electrolytes and waste material. It maintains body temperature by distributing heat in a uniform manner during circulation. It maintains ion and ph balance (covered more on renal physiology). It gives the body immunity against foreign particles (bacteria, virus) and helps to prevent blood loss (haemostasis): sometimes capillaries may rupture, and haemostasis functions take over to stop blood loss.
