BIOL 104 Lecture Notes - Lecture 3: Portal Vein, Amniote, Arteriole
20 Feb 2018
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Blood pressure goes up, bad cholesterol goes up. Skin wrinkles faster collagen breaks down in skin. Pregnancy risks associated with smoking deprives baby of oxygen. 480,000~ us deaths due to smoking per year: circulatory system. Provides the body (cells) with oxygen, and removes carbon dioxide. Provides the body (cells) with nutrients and remove wastes: two main types, open. Bod(cid:455) fluids do(cid:374)(cid:859)t sta(cid:455) i(cid:374)side (cid:271)lood (cid:448)essels all the ti(cid:373)e. Only a few large blood vessels are present; no smaller vessels and no capillaries. Whe(cid:374) the heart (cid:271)eats, fluid (cid:373)o(cid:448)es through the heart, a(cid:374)d the(cid:374) is just (cid:862)du(cid:373)ped(cid:863) into the body tissues. The large vessels simply help to distribute the fluid a bit. All parts of the body are (cid:862)(cid:271)athed(cid:863) i(cid:374) this fluid. Common particular in insects and other arthropods: closed. Small blood vessels are present throughout the tissues. This insures that blood can get to all parts of the body. Common in humans, earthworms, and vertebrates: the heart.
