[BIOL 273] - Final Exam Guide - Everything you need to know! (87 pages long)

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The cranial cavity (skull: contains the brain. The thoracic cavity (thorax: bounded by the spine and ribs and muscular diaphragm, contains the heart surrounded by a pericardial sac, contains the lungs surrounded in pleural sacs. Lumen: the interior or any hollow organ is called its lumen, may be partially or fully pilled with air or fluid, the heart, lungs, blood vessels and intestines have a lumen. Extracellular fluid: plasma: the fluid portion of blood. Intracellular fluid: fluids within the cell membrane. Motor proteins: mysoins, bind to actin filaments and are involved in muscle contraction, kinesins, assist the movement of vesicles along microtubules, dyneins, associate with microtubule bundles. Epithelial tissue lines blood vessels and lungs: very thin flat cells that allows gases to pass across them, aka simple squamous epithelium, endothelium lines the heart and its blood vessels. Transporting epithelium: regulate the exchange of non gaseous materials such as ions and nutrients, line the lumen of the digestive system and kidney.

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