Musculoskeletal System
What 2 systems make up the musculoskeletal system?
Muscular
Skeletal
The respiratory system allows us to do what?
breathe
Cardiac muscles are found ________
in the heart
There are hairs in your nose and trachea that do what?
Filter out dust and other particles
What else does the musculoskeletal system do besides allowing us to move?
protects our organs
How many alveoli are in the human body?
about 600 million (300 to 400 million in each lung)
Muscles help us to _________
move
The trachea is also known as the ___________
windpipe
Skeletal muscles are voluntary, which means what?
You can control them
The walls of the trachea are strengthened by what?
rings of tissue
The human body has __________ bones
206
We breathe in __________ and breathe out _________
oxygen, carbon dioxide
What do tendons do?
connect bone to muscle
What are the two pathways at the bottom of the pharynx?
esophagus, lungs
Muscles make up _________ of a person's body weight
half
At the end of the bronchioles are tiny air sacs called ____________
alveoli
What does cartilage do?
helps to support our bones and protects the spots where they rub against each other
At the bottom of the trachea are two tubes called what?
bronchi
Joints are the points where __________
two bones meet
The diaphragm moves ______ when we breathe in, and _______ when we breathe out
down, up