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Chapter 8 Review

QuestionAnswer
Platelets are helpful in ________. clotting the blood
which of the following body parts is about the size of a human fist? the heart
Which blood vessels carry blood to the heart? veins
What is the principal function of digestive enzymes? breaking down food
Almost half of our blood consists of _______ red blood cells
circulatory system blood vessels
respiratory system the lungs
excretory system the kidneys
nervous system the spinal cord
digestive system the small intestine
endocrine system glands
skeletal system bones
muscular system biceps and triceps
The central nervous system has two main parts, the brain and the ______. spinal cord
The ______ carry impulses from the brain and spinal cord to muscles and glands. motor neurons
Bones come together at ______. joints
The brain picks up many different messages from the _____ organs sense
The brain sends messages to other parts of the body through the _____ cells. nerve
peristalsis Smooth muscles in the esophagus contract, or squeeze together, to push food toward the stomach.
Mechanical digestion the mechanical action to make food pieces smaller
chyme liquid food in the stomach
Arteries carry oxygen rich blood to the blood
veins carry carbon dioxide rich blood to the heart
perspiration liquid waste made of heat, water, and salt released through the skin
peripheral nervous system the nerves in the body that carry messages
brain stem controls automatic systems in your body
automatic systems in your bosy heart rate, gland secretions, digestion, respiration, circulation
What are some reflex actions? Sneezing, coughing, and blinking
What does the pupil do when you go into a dark room? It gets bigger to let more light in.
Why can't you smell when your nose is plugged? Holding your nose stops air from reaching the receptor cells in your nose. As a result the brain doesn't receive impulses from the nose, and you lose much of your sense of taste.
Why do your adrenal glands release adrenaline? gives the body strength and speed
Created by: anhold133