gr8 science Flashcards
main purpose of circulatory system
oxygen and carbon dioxide transport
circulatory system main organs
heart, lungs, blood vessels, blood
types of blood vessels
arteries,capillaraies,veins
what does the arteries do
Carry blood away from the heart
what do the capillaries do
where oxygen exchange happens
veins
carry blood back to the heart
what do platelets do
help you stop bleeding
what is the human heart made of
muscle tissue
what does the human heart do
move blood throughout body
aorta
main artery in human body
left atrium
receives blood from the lungs
left ventricle
pumps blood to rest of body
right atrium
receives blood from body
right ventricle
pumps blood into lungs
what does the respiratory system do
oxygen to carbon dioxide and provides oxygen to tissues
what is the trachea
large opening to allow airflow and also allow us to breathe
what is the bronchi
branching allows greater surface area for absorption
what does the alveoli do
increase surface area for gas exchange
what does the digestive system do
break down foods that can be absorbed into your bloodstream
two types of digestion
chemical and mechanical
teeth breaking down food is what
mechanical digestion
saliva breaking down starch
chemical digestion
what does the esophaugs do
tube that carries food from your larynx to your stomach
what does stomach do
Enzyme called PEPSIN is activated by hydrochloric acid in the stomach Digests PROTEIN - breaks down into amino acids
small intestine
has villi inside, where nutrients are absorbed, longest section of digestive system
large intestine
move waste out of the system
correct order of stomach parts
mouth,esophaugus,stomach,enzyme,small intestine, large intestine
endocrine system
regulates the functions in our bodies by releasing hormones into them
what is the central nervous system
composed of the brain and ur spinal cord
excretory system
main function is to eliminate waste products.
what is the peripheral nervous system
branches of nerves going out to rest of body
motor neurons
tells muscles how to move
sensory neurons
different inputs from the outside worl
reflex arc
delayed reaction
what is bronchitis
inflamed lining of bronchioles
asthma
bronchioles narrow
emphysema
damaged alveoli
how does smoking effect respiratory system
tar, carbon monoxide, nicotine
colon cancer
irritates colon wall
peptic ulcer
hole in stomach or small intestine
celiac
allergic to gluten, villi in small intestine doesn’t absorb gluten properly
