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Organismal level- many different organ systems making up an organism
2. Necessities of life- maintain boundaries, homeostasis, irritability/responsiveness, growth, reproduction, excretion, digestion, metabolism
3. The smallest unit of a living thing is a cell.
4. Hematopoiesis is the formation of blood cells in the red marrow found in flat and long bones.
5. Table for body systems and their functions
Body System Function
Integumentary System Forms the external covering of the body; protects deeper tissue from injury; synthesizes vitamin D; location of cutaneous (pain, pressure, ect.) receptors; and sweat and oil glands
Skeletal System Protects and supports body organs; provides a framework the muscles use to cause movement; blood cells are formed within bones; stores minerals
Muscular System Allows manipulation of the environment, locomotion, and facial expression; maintains posture; produces heat
Nervous System Fast-acting control system of the body; responds to internal and external changes by activating appropriate muscles and glands
Endocrine System Glands secrete hormones that regulate processes such as growth, reproduction, and nutrient use(metabolism) by body cells
Cardiovascular System Blood vessels transport blood, which carries oxygen, carbon dioxide, nutrients, wastes, ect...
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