human body Flashcards
Levels of organization in the body
Cells - basic unit of life
Tissues - a group of similar cells that perform the same function
Organ -groups of tissue working together
Organ system - group of organs working together
Muscle tissue
-allows body to move and move things in the body
Epithelial tissue
- covers the surface of the body and the outside of internal organs
Nerve tissue
- brain, spinal cord, and nerves-
Connective tissue
-connect and support parts of the body
Nervous system
interprets info
Digestive system
breaks down food
Respiratory system
takes in oxygen and releases co2
Skeletal system-
supports the body
Circulatory system
carries needed materials throughout the body
Reproductive system-
creates offspring
Endocrine
controls body processes
Immune system
fights diseases
Excretory system
removes waste
skin
protects body
homeostasis
the process by which an organism’s internal environment is kept stable in spite of changes in the external environment.
Example body temperature internal 37 degrees celsius, external temperature 34 degrees celsius
Heart rate adult 60-90 beats a minute
Stress
the reaction of your body and mind to threatening, challenging, or disturbing events.
Stress upsets homeostasis and causes your body to react in specific ways
