Bones
Why are some bones long while others are shaped like cages?
The long ones are mainly for movement (their length gives them leverage). The cage-shaped ones are for protecting organs.
What is a joint?
a place where to bones are connected together.
How are men and women different in their types of strength?
Men generally have more lifting strength.
They generally both have the same amount of endurance.
What two parts make up the inside of a bone?
Hard, mineral deposits and soft, blood tissues
What two things prevent bones from rubbing against each other?
Solid cartilage padding and liquid synovial fluid
One contracts doing the work while the other relaxes.
When that muscle relaxes, the other muscle is contracting to do the workEx. biceps and triceps, lower back and abs, upper back and pects, quads and hamstring, flexors and extensors, etc.
What are the three types of blood cells that bones produce, and what does each one do?
Red blood cells- carry oxygen and nutrients throughout the body
White blood cells- fight disease
Platelets- stop bleeding by forming scabs
Compare and contrast ligaments and tendons.
The both are tissues that connect muscles and bones.
Ligaments only attach bone to bone, but tendons attach muscles to bone.
What are the three main types of strength?
What are the four main functions of bones?
They provide shape, protect organs, allow movement, and produce blood cells.
What are the four main types of joints? Give an example of each type from our bodies.
hinge- elbow, knee
ball and socket- shoulder. pelvis
pivot- vertebraeWhen are you the strongest in each type of strength?
Flexibility- the younger the better
Lifting strength- around 25-30 years old
endurance- around 25-30 years old
Why do adults only have ~210 bones, when they were born with ~300?
The bones grow together to form fixed bones.
What are the strengths and weaknesses of each type of joint?
ball and socket- allow for most movement rotational, easier to injure and harder to repair
pivot- allows for looking behind us, also easy to injure and harder to repair
hinge- simplest movement for routine moves, no movement in other directions
fixed- hard to break, no movement
What happens to muscles and bones in Space?
What do astronauts do about it?
The muscles shrink smaller with the bones getting weaker without gravity, so astronuats exercise a couple hours each day.
What are three examples of jobs that apply bones and muscles information?
Archaelogists- study the nutrients, shapes, possible cause of violent deaths
Crime Scene Investigators- predict height, match DNA, and get other information from it
doctors- check for bone and muscles problems to help their patients get better
physiotherapists- do treatments and exercise to help people recover from injuries
Everyone- should eat healthy, be active, rest, and take care of their bodies.