Transcript Do Now

AIM:
What are the functions of the
CIRCULATORY SYSTEM?
Do Now:
How does glucose (which is
absorbed by the small intestine
from food eaten) get to your
muscles to be used for energy?
What are the 5 functions of the
circulatory system?
1. Transport materials to the cells
(nutrients, O2)
2. Carry wastes away from cells
(CO2,, nitrogen, urea)
3. Carry hormones to cells
4. Fight disease (WBC, platelets)
5. Regulate body temperature
What are the parts of blood?
1. RED BLOOD CELLS (RBC’s)
- make up 44% of your blood.
- contain hemoglobin made with iron which
carries oxygen.
- produced by the bone marrow
2. WHITE BLOOD CELLS (WBC’S)
- make up 0.5% of your blood
- fight infection by killing germs and
producing antibodies
- produced by bone marrow and lymph
nodes
3. PLATELETS
- make up 0.5% of your blood
- clot blood to stop bleeding
- form scabs
4. PLASMA
- make up 55% of your blood
- liquid part of the blood (mostly
water) which carries materials to
and from body cells
Do Now:
Which blood cell is the largest?
The smallest?
Where is each blood cell made?
Which blood cell is the most
numerous in blood?
What are the 4 blood types?
- A, B, AB, O
Why is knowing your blood type
important?
- If you need to get blood, it must be
a compatible type of blood.
Crossing blood types could result in
blood clots and possibly death.
What are the types of blood vessels?
1. ARTERIES
- carry blood AWAY from the heart.
- they are thick, muscular blood vessels.
- they have a PULSE.
- AORTA is the largest artery in the
body.
2. VEINS
- carry blood to the heart.
- they have VALVES to prevent backflow of
blood.
- not as thick as arteries.
3. CAPILLARIES
– connect arteries and veins
- smallest blood vessels
- only 1 cell thick to allow DIFFUSION
of nutrients and gasses from blood to
cells
Aim: How does the HEART
Do Now:
1) Take out HW
2) Which blood type is called …
the universal donor?
the universal recipient?
work??
What is the heart?
- Muscular organ which pumps blood
What are the parts of the heart?
1. ATRIA
- small upper chambers (there are 2).
- collect blood from the body (right)
and lungs (left)
2. VENTRICLES
- large, muscular, lower chambers
(there are 2)
- pump blood to the body and lungs
3. VALVES
– flaps of tissue which prevent blood
from flowing backwards.
- found between atria & ventricles
4. SEPTUM
- wall of muscle which separate left
and right sides of the heart.
- this keeps oxygenated blood
separate from deoxygenated blood.
Aim:
What are Some Disorders of the
Circulatory System?
Do Now:
Study For Quiz
You have 4 minutes
NO TALKING !!!!!
What controls heart rate?
- the brain (medulla) and special
tissue in heart called the
PACEMAKER. Avg. pulse is 70-80
beats per minute
What are some diseases of the
circulatory system?
1. STROKE
- blockage of blood to the brain
2. HEART ATTACK
- blockage of blood to the muscles of
the heart
3. HEART MURMUR
- leaky heart valve
4. VARICOSE VEINS
- leaky leg valves
4. ANEMIA
- lack of RBC’s, can’t carry oxygen, due
to low iron in diet.
5. LEUKEMIA
- cancer resulting in too many WBC’s
6. HEMOPHILIA
- slow blood clotting
7. ANEURISM
- tear in a blood vessel
Aim:
What is the LYMPHATIC SYSTEM??
Do Now:
1. Copy HW
2. What are the body’s three lines
of defenses??
LYMPHATIC SYSTEM
What is LYMPH?
- Lymph is plasma which has diffused out
of blood vessels and is recollected by
lymph vessels to be returned to the
blood
What are LYMPH NODES?
- Specialized tissues which store and
produce WBC’s.
- They filter foreign invaders from lymph
- They become swollen when you are sick