Structural Organization of the Human Body Flashcards
Describe the structure of the human body in terms of 6 levels of organization
Chemical, cellular, tissue, organ, organ system, and organismal levels
What is the human cell composed of?
A flexible membrane that encloses the cytoplasm (water based cellular fluid) and contains organelles (tiny functioning units)
Molecules are chemical building blocks of all body structures. True or False?
True
The cell is the smallest independently functioning unit of a living organism. True or false?
True
Tissue is a group of similar cells that work together to perform a specific task. True or False?
True
An organ is a distinct structure comprising multiple tissues and performs specific functions. True or False?
True
Most organs contribute to multiple systems. True or False?
True
What is the Integumentary System?
- composed of the hair, skin, and nails
- it encloses internal body structures
- the site of many sensors
What is the Skeletal System?
- composed of cartilage, bones, and joints
- it supports the body
- enables movement
What is the Muscular System?
- composed of skeletal muscles and tendons
- enables movement
- helps maintain body temperature
What is the Nervous System?
- composed of the brain, spinal cord, and peripheral nerves
- detect and process sensory information
- activate bodily responses
What is the Endocrine System?
- composed of the pituitary and adrenal glands, thyroid, pancreas, ovaries (female), and testes (male).
- secretes hormones
- regulate bodily processes
What is the Cardiovascular System?
- composed of the heart and blood vessels
- delivers oxygen and nutrients to tissues
- equalizes temperature in the body
What is the Lymphatic System?
- composed of the thymus, lymph nodes, spleen, and lymphatic vessels
- return fluid to blood vessels
- defend against pathogens
What is the Respiratory System?
- composed of the lungs, trachea, and nasal passage
- removes CO2 from the body
- delivers O2 to the blood
