Transcript Human Body Systems - Holy Family School

SECOND TRIMESTER
Unit Two: Human Body Systems
Standards 3.3.7.A, 3.3.7.B, 3.3.7.C
7th Grade
I. Skeletal System – helps body move, supports the body and protects
internal organs
A. Bones – 206
1. periosteum – tough outside covering
2. bony tissue – hard bone
3. marrow – soft tissue in center of many bones. Red marrow
in end of bones produces blood cells. Yellow
marrow in the middle has fat cells.
B. Bone connectors
1. cartilage – rubbery tissue between bones; acts as a cushion
2. ligament – strands of tough tissue
3. joints – point at which two bones move against each other
4. tendons – connect muscle to the bone
https://www.schooltube.com/video/4d20526eaf1c4adeb4e6/Bill%20N
ye%20Bones%20and%20Muscles
Skelton
II. Muscle System –
tissues that help move the body
A. Skeletal – voluntary muscles that one can
control
B. Smooth – involuntary muscles that one
does not control
C. Cardiac – special involuntary muscles found
only in the heart
• III. Respiratory System – helps
the body use food and oxygen
to obtain energy. Takes in
oxygen and gives off carbon
dioxide. Parts of the body that
cooperate in the respiratory
process are: nose, trachea,
lungs, and diaphragm.
• IV. Circulatory System – supplies the body tissues with food
and oxygen and removes waste and carbon dioxide
A. Parts of the Circulatory System
1. Heart includes
the atrium (2 upper chambers) and
the ventricle (2 lower chambers)
2. Vessels
a. artery – carries blood away from
b. vein – carries blood to heart
c. capillaries – tiny blood vessels
connecting veins and arteries
heart
http://www.neok12.com/video/Circulatory-System/zX5d7d0e41705968036a4351.htm
B. Blood (5 2/3 liters or 6 quarts)
1. Parts of Blood
a. plasma – fluid part of blood;
contains water and
antibodies to fight disease
b. red cells – produced in red marrow
of bones, carry
oxygen and hemoglobin
c. white cells – fight disease
d. platelets – smallest blood cell,
helps clot blood
https://www.youtube.com/watch?v=a_X9oTr3PlI
2. Blood Types – human blood falls into four
types. Transfusions of blood must be to the
correct type including the correct RH factor.
a. O – universal donor. give to O, A, B
b. A – gives to A and AB
c. B – gives to B and AB
d. AB – gives to AB only