Body Systems
What are the two main jobs of the skeletal system
How many bones are in the adult body?
206
The medical name for shoulder blades.
scapula
True or False----your elbow is a joint
True
What is your strongest muscle?
Heart
The system that sends messages up and down your spine to your brain.
Nervous system
Cranium or skull
The larger of the two bones in your lower leg.
tibia
Joints are cushioned by _________.
cartilage
There are about _____ muscles in the human body.
650
What is the function of the digestive system?
It helps break down food, splitting food into nutrients that give your body energy to help it live and grow.
vertebrae
What is inside of your bones?
bone marrow
_______ connects bones to other bones.
Ligaments
________ connects muscles to bones.
Tendons
What system gets rid of liquids that may be harmful if they stay in the human body?
Excretory system
Another name for breastbone
sternum
True or False----Bones grow as you grow
True
What are the three main types of joints in your body?
Movable, immovable, and partially movable
Muscles work in pairs. What does that mean?
Because muscles only pull on bone, one muscle needs another muscle to pull a bone in the opposite direction when it wants to move. One muscle pulls while the other relaxes. The paired muscle relaxes while the other pulls.
Describe cells and their function.
Cells are the building blocks of life, and they are found only in living things. Cells are living things that are constantly dividing and multiplying; they can also die.
What are two ways to take good care of your bones?
Eat a healthy diet and exercise.
Bones absorb a lot of _____ light, where as soft tissue around your bones absorbs less _____ light.
True or False----hips and shoulders have hinge points
There are _____ muscles in your stomach that help you digest food.
involuntary