BIOL 118 Lecture Notes - Lecture 4: Sebaceous Gland, Fibrin, Phagocyte
Document Summary
Considered a tissue because it"s made of cells. Maintain ph and water balance: protection: Immunity: the defense of the body against disease organisms and other foreign materials: clotting. 90% water 10% ions, nutrients, waste, hormones, enzymes, antibodies, clotting factors. Red blood cells: carry oxygen, no nuclei when mature. Series of enzymes controlled reactions that seals an injury site and stops the loss of blood. Proteins thread called fibrin trap platelets and other cells to form the clot. Immunity: the defense of the body against disease organisms and other foreign materials. The basis of immunity lies in the ability of the body to recognize self vs. foreign objects or non-self . Pathogens: disease causing microorganisms such as bacteria and viruses. Antigens: substance that can cause an immune response. General defense against wide range of pathogens. Body"s defenses: physical and chemical barriers. Skin, membranes, sweat, tears, mucous, saliva, stomach acid. Mucous: haris help trap particles, cilia move particles: inflammatory response.
