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Musculoskeletal System
Common names
Vocabulary Lesson 2
1. skeleton – the framework of
connected bones in your body
2. bone – is an organ of the skeletal
system that stores minerals
3. bone marrow – soft tissue inside
a bone that makes blood cells and
stores fat
4. cartilage – the tissue between
the bones in your movable joints
5. joint – is a place where two or
more bones meet
6. ligament – connects bones
together at joints
7. tendon – attaches muscles to
bones
8. Osteoporosis – a disease in
which the bones become weaker
9. arthritis – painful joints
10. voluntary muscles – muscles
you have control over
11. involuntary muscles – muscles
you do not have control over
1. What is your Skeletal System?
a. The skeleton is the
framework to hold you up and
protect organs
– b. More than 200 bones – 206 as
an adult
– c. Almost every bone is connected to
another bone by a joint
i. Ligaments hold two bones
together at joints
ii. Joints also allow bones to move
iii. Tendons attach muscles to bones
–d. types of bones – long, short, flat,
irregular
2. Bone and joints
2. Bone and joint development
– a. cartilage between bones in movable
joints, keeps bones from grinding
together
– b. soft flexible tissue when you are a
baby, as you get older it hardens and
becomes bone tissue as minerals, such
as calcium, build up in the bone
– c. types of joints – fixed, slightly
moveable, and synovial (ball and
socket, hinge, gliding, pivot, and
saddle)
– d. Osteoporosis – is a disease in which
the bones become weaker
– e. Arthritis – is irritation of the joints,
painful joints
Joints
3. What is your muscular system?
– a. Made up of all your muscles
– b. Movement occurs by contracting the
muscle (length shortens)
– c. Some muscles stretch across
movable joints
–
–
d. Connection of bone to muscle =
tendons, bone to bone = ligaments
e. Muscles only pull, not push – helped
by working in pairs - ex: bicep and
tricep
When one contracts, the other relaxes
–
f. muscles you have control over are
voluntary – EX: moving your arm to
catch a ball, muscles that you do not
have control over are involuntary – EX:
heart beating
4. Kinds of muscles
Skeletal muscle – muscles that is
attached to bones, when they contract
they pull on bones causing bone
movement
Smooth muscle – is muscle that forms
some internal organs, contraction of this
type of muscles pushes materials
through the organ
Cardiac muscle – is muscle that forms
the heart
Review Lesson 2
Review – Lesson 2
What does your skeleton do?
What does bone marrow do?
How do your muscles make your
bones move?
List the 3 kinds of muscles and
describe their functions.