Structural level of organization
Cards (18)
- Chemical level
- smallest level
- foundation for each successive cell
- ranges from atoms to complex chemical structures
- composed of thousands of atoms
- Cellular level - groups of many different types of molecules combined in specific ways to form cellular structures
- Tissue level - two or more cell types cooperate perform a common function
- Organ level - two or more tissue types combined to form an organ
- Organ system level - two or more organs combined together to carry out broad function
- Organism level - organ systems function together to make up the working human body.
- Human body has 11 organ systems
- Skeletal system
- Provides support
- Protects Internal organs
- provides leverage for movement
- produces blood cells
- Stores calcium salts
- Muscular system
- Produces movement
- Generates heat
- Controls body openings
- Nervous system
- Regulates body functions
- Provides sensation, movement, automatic functions, and higher mental functions via nerve impulses
- Endocrine system
- Regulates body functions
- Regulates the functions of muscles, glands, and other type of tissues through the secretion of a chemical called hormones
- Cardiovascular system
- Pumps and delivers oxygen-poor blood to the lungs and oxygen rich-blood to the tissues.
- Removes wastes from the tissues
- Transports nutrients, cells, and other substances
- Lymphatic system
- Returns excess tissue fluid to the cardiovascular system
- Provides immunity (protection against diseases)
- Respiratory system
- Delivers oxygen to the tissues
- Removes carbon dioxide from the body
- Maintains the acid-base balance
- Digestive system
- Digests food
- Absorbs nutrients into the blood
- Removes food waste
- Maintains fluid, electrolyte and acid-base balance
- Urinary system
- Removes metabolic wastes from the blood
- Maintains fluid, electrolyte, and acid base-balance
- stimulates blood cell production
- Male reproductive system
- Produces and transports sperm
- Secretes hormones
- Sexual function
- Female reproductive system
- Produces and transports oocytes (eggs)
- Site for fetal development, fetal nourishment, childbirth, and lactation
- Secretes hormones
- Sexual function