Body Systems I
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Terms in this set
- Cardiovascular System The heart and blood vessels, which transport oxygen, nutrients, hormones, and wastes; blood flows right atrium, right ventricle, lungs, left atrium, left ventricle, body.
- Respiratory System The airway and lungs — nose/mouth, pharynx, larynx, trachea, bronchi, bronchioles, alveoli — where oxygen enters the blood and carbon dioxide leaves by diffusion across the alveolar walls.
- Digestive System The gastrointestinal tract (mouth, esophagus, stomach, small intestine, large intestine) plus accessory organs (liver, gallbladder, pancreas) that break food down and absorb nutrients.
- Nervous System The body's rapid control network: the central nervous system (brain and spinal cord) processes information carried to and from the body by the peripheral nervous system's neurons.
- Endocrine System Glands — pituitary, thyroid, adrenals, pancreas, gonads — that release hormones into the blood to regulate growth, metabolism, stress, blood sugar, and reproduction.
- Blood & the Immune System Blood carries red cells (oxygen via hemoglobin), white cells (defense), platelets (clotting), and plasma; the immune system mounts innate (immediate, nonspecific) and adaptive (targeted, with memory) defenses.
- Integumentary System The skin (epidermis over dermis over hypodermis), hair, nails, and glands — the body's first barrier, temperature regulator, vitamin D producer, and sensory surface.