3/26/15
Discussion Questions
Using your textbook, journal, handouts, or smart phone please complete the
following:
1. Please describe the function and structures of the
Integumentary System.
2. How are the Integumentary System and the Immune System
related?
3. How are the Integlumentary System and Excretory System
related?
4. Describe one other relationship between the Integumentary
System and another body system.
Videos
united streaming
Reminders
Review your discussion questions and ppt notes ~5 min each
night for the daily quizzes.
Go to room 1135 Tues or Thurs for Science Peer Tutoring
during PLC
QUIZ
Clear your desks of everything
Do NOT write on the quiz please
Use CAPITAL letters please
Keep your answers covered
If you need to make up a quiz due to an absence…
come see me Tues or Thurs during PLC
Flip it over when you are finished and hang on to it
Today’s Objective:
OBJECTIVES: Learn the structures and functions of
the muscular and skeletal systems
Muscular System
General Characteristics
1. works with skeleton to produce movement
2. voluntary movement – deliberate moving of
body parts
3. involuntary movement – circulate blood, move
food through the digestive tract
Three Types of Muscle Tissue:
1.
skeletal muscle – attached
to skeleton, striated: appear
striped, voluntary
2.
smooth muscle – in walls of
stomach, blood vessels and
intestines, not striped,
involuntary, causes food to
move through digestive
system
3.
cardiac (cardio = heart)
muscle – in the heart,
striated, involuntary, may
have two nuclei, causes
heart to beat.
Muscle contraction – two types of fibers are
found in muscle cells. These fibers slide
across each other to contract each long,
cylindrical muscle cell
Z line
Myosin
Actin
Z line
1. Myosin – thick fibers
2. Actin – thin fibers
Sarcomere
Cross-bridges
Z line
Muscle Pairs
•
Muscles have to work in pairs to move your bones.
– When one muscle contracts the other must relax.
Muscle slide pictures
Skeletal Muscle
Smooth Muscle
Cardiac Muscle
Skeletal Tissue
Skeletal System
General Information:
1. provides support for the body
2. protects internal organs
3. provides movement
4. stores minerals
5. site for red blood cell, white blood cell and
platelet formation
Bone Structure:
1. Solid network of living cells & protein fibers
surrounded by calcium salts
2. Periosteum – covering
3. Haversian canals – tubes that carry blood vessels &
nerves
4. Osteocyte – mature bone cells
5. Bone marrow – soft tissue in middle of bones
(yellow marrow is fat, red marrow makes blood
cells)
Spongy bone
Compact bone
Periosteum
Haversian
Compact
canal
bone
Bone
marrow
Spongy
bone Osteocyte
Artery
Periosteum
Vein
Cartilage – tough flexible connective tissue
– found at ends of bones, nose & ear
– skeleton of embryos
– Ossification – cartilage is replaced by
bone during development
• Ligaments – hold bone to bones at joints
• Tendons – connect muscles to bones
• Osteoporosis – condition in which bones
weaken and are easily broken
A
B
C D
E
F
G
H
I
K
O
P
N
M
J
L
R
Q
S
T
U
V
W
Q
Ball-andSocket
Saddle
Hinge
Pivot
Activities for the Day
New Groups
Handouts
Work on journals for the next journal check
\