Aim: How does blood help us to
complete transport throughout our
bodies?
Do Now:
Complete handout
HW: CASTLE LEARNING
Homeostasis: “Circulatory system”
TEXTBOOK PAGES 582-589 Q’S 1-5 &
p.582 vocab Due FRIDAY !!!!
ARTERY:
Highly elastic,
muscular tube
that expands
and contracts.
*Carries oxygen rich blood
(oxygenated)
VEIN:
*Thin, slightly
elastic tubes.
*Contain valves to
prevent back flow
of blood
Carries deoxygenated
blood to the heart
Capillary:
Extremely small
tubes (1 cell
thick), where
materials are
exchanged by
diffusion
Capillaries connect arteries to veins
artery
Network
Of
Capillaries
vein
“Blood is thicker than
Water ”
Group of cells (connective tissue)
Made in bone marrow.
Initial blood cells are called stem cells.
Functions of blood:
1) Transportation: O2, CO2, nutrients
2) Regulation: fight disease, remove waste, carry
hormones, temp., pH
3) Protection: clotting & against disease
Red Blood Cells
Platelets
White Blood Cells
• a fluid, no cells
• Liquid portion of blood
• contains:
90% water
10% salts
(Erythrocytes)
•
•
•
•
•
30 trillion in body
120 day lifespan
Disk shaped
No nucleus
Contain Hemoglobin
red pigment which helps to carry O2 and
CO2 in the presence of Iron
(Leukocytes)
60 billion in body
Colorless
Irregular in shape
Have 1 or many
lobed nuclei (us)
Function:
• Protect against
foreign substances
• create
ANTIBODIES
• Engulf pathogens
Neutrophil
White Blood Cells
Eosinophil
Lymphocyte
(Thromboocytes)
•
•
•
•
•
1.5 trillion in body
7 day lifespan
Bits of cytoplasm
No nucleus
Aid in the process of blood clotting to
prevent blood loss
Plasma: 55%
Red Blood Cells
(4.8 – 5.4 million)
White Blood Cells
45%
(5,000-10,000)
Platelets (150,000 –400,000)
VIDEO
is the relaxation and expansion of an
artery each time the heart pumps. Pulse
depends on:
–1) how blood is transported
–2) how many times the heart
pumps/min.
– (usually 60-80x’s/min.)
Force created by the movement of
blood within the blood vessels.
a) Systolic pressure= the force of the
blood when the heart ventricles
CONTRACTS.
b) Diastolic pressure= the force of the
blood when the heart ventricles is
RELAXED.
is measured using a
sphygmomanometer
Average Normal blood pressure
120/80
List reasons why we
can’t live without
blood
1. Transport: Carries oxygen, carbon
dioxide and nutrients
2. Protection
a. Clotting: Keep body sealed from foreign
substances
b. Fighting
foreign invaders (antigens)