Body Organization + Systems II Flashcards
6 levels organization to anatomy:
Chemical (atoms + molecules) Cellular Tissues Organs Systems Organismal
Atoms
Smallest unit of matter
Molecules
Two or more atoms joined together
Atoms essential for life:
Carbon Hydrogen Oxygen Phosphorus Nitrogen Calcium
At cellular level, molecules combine to form…
Cells
Cells are basic structural and functional unit of an…
Organism (smallest living unit in human body)
Cell
Smallest living unit in human body
Tissues
Groups cells and materials around them that work together to perform specific function
4 types of body tissue:
Epithelial tissue
Connective tissue
Muscle tissue
Nervous tissue
Epithelial tissue
Covers body surfaces
Lines hollow organs/cavities
Forms glands
Connective tissue
Connects, supports, protects body organs
Distributes blood 🩸 vessels to other organs
Muscular tissue
Contracts to make body parts move
Generates heat via movement
Nervous tissue
Carries sensory + motor information from one part of the body to another
Organs
Structures made of 2 or more different types tissues
Specific functions
System
Related organs that perform common function
