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Chapter 1
| Question | Answer |
|---|---|
| Chemical level | Basic level; includes atoms, smallest components of a chemical element, and molecules. |
| Atoms essential for life | Carbon, Hydrogen, Oxygen, Nitrogen, Phosphorus, Calcium, and Sulfur |
| Cellular level | Molecules combine to form cells; Muscle cells, nerve cells, and blood cells |
| Cell | Smallest living unit in the human body |
| Tissue level | Epithelial, connective, muscle, nervous |
| Tissue | Groups of cells and the materials surrounding them that work together to perform a particular function. |
| Organ level | Different types of tissues join together to form body structures. |
| Organs | Recognizable shape, different types of tissues, have specific functions. |
| System level | Consists of related organs that have a common function. EX: Digestive system |
| Organism level | Any living individual |
| Integumentary system | Protects body; regulate body temperature; eliminates some wastes; helps make vitamin D; detects sensations such as touch, pain, warmth, and cold |
| Muscular system | Participates in body movements, such as walking; maintains posture; produces heat |
| Skeletal system | Supports and protects body; provides surface area for muscle attachments; aids body movements; houses cells that produce blood cells; stores minerals and lipids(fats) |
| Nervous system | Generates action potentials to regulate body activities; detects changes in body's internal and external environment, interprets changes, and responds by causing muscular contractions or glandular secretions |
| Endocrine System | regulates body activities by releasing horomones |
| Lymphatic system and immune | Returns proteins and fluid to blood; carries lipids from gastrointestinal tract to blood; contains sites of maturation and proliferation of B cells and T cells that protect against disease-causing microbes. |
| Cardiovascular system | Heart pumps blood through blood vessels; blood carries oxygen and nutrients to cells and carbon dioxide and wastes away from cells and helps regulate acid-base balance, temperature, and water content of body fluids; |
| Blood components | help defend against disease and repair damaged blood vessels |
| Respiratory system | Transfers oxygen from inhaled air to blood and carbon dioxide from blood to exhaled air; helps regulate acid-base balance of body fluids; air flowing out of lungs through vocal cords produces sounds |
| Digestive system | Achieves physical and chemical breakdown of food; absorbs nutrients; eliminates solid waste |
| Reproductive system | Release hormones that regulate reproduction |
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glosantelices
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