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Grade 4 Unit 2: Body Systems
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(Male or female?): an egg travels down from the ovaries
female
(Male or female?): they travel aalong the urethra
male
(Male or female?): sperm are made in the testicles
male
(Male or female?): most of the reproductive organs are inside the body
female
when does the fetus have all its organs?
at 3 months
how big is the embryo at six weeks?
about the size of a small seed
where does the fertilixzed egg go?
to the uterus
how long is it betwen when an egg is fertilized and a baby is born?
9 months
do the ribs protect the brain, or heart and lungs?
heart and lungs
where does our body bend?
at joints
are muscles hard or elastic?
elastic
are bones rigid or flexible?
rigid
is breathing voluntary or involuntary?
involuntary
what carries messages to and instructions from the brain: nerves or msucles?
nerves
how many senses do we have: 4, 5, 6?
5
what controls everything: brain, or senses?
brain
what happens to the air when we breath out?
it's pushed out of the lungs
what happens to the chest when we breath out
it gets smaller
what happens to the diaphram when we breathe out?
it relaxes, it goes up
what happens to the air when we breathe in?
it's pulled into the lungs
what happens to the chest when we breathe in?
it gets bigger
what happens to the diaphram when we breathe in?
it contracts, it goes down
what are the different parts of our respiratory system?
nostrils, trachea, bronchi, and lungs
which arts of our body need oxygen?
every part- all msuiclaes and organs need o2
capillaries are where the blood delivers oxygen and nutrients to the cells and picks up _____
carbon dioxide
blood vessels that carry blood to the heart are called _________
veins
blood vessels carry blood around the ______
body
the heart is a hollow _________
muscle
the circulatory system takes blood to all parts of the ________
body
(T/F? correct if false): urine is stored in the urethra
false: urine is stored in the bladder
(T/F? correct if false): urine is made in the kidneys
true
(T/F? correct if false): urine is made in the kidneys
true
(T/F? correct if false): all out muscles and organs need urine to function
false: they need nutrients
(T/F? correct if false): waste leaves the bopdy through the large intestine
false: through the anus
(T/F? correct if false): most nutrients pass into the blood in the small intestine
true
(T/F? correct if false): food mixes with gastric juices in the small intestine
false: in the stomach
(T/F? correct if false): food goes down the small intestine into the stomach
false: it goes down the esophagus
(T/F? correct if false): food is mixed with saliva in the mouth
true