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Body Systems
body systems
36
Biology
10th Grade
05/30/2012

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Term
respiratory system
Definition
gas exchange
Term
what is the pathway of air through the respiratory system?
Definition
nasal cavity-->trachea-->bronchi-->bronchioles-->alveoli
Term
what happens in the alveoli?
Definition
O2 diffuses from alveoli to the capillary
Term
atria
Definition
top chambers of heart. receive blood
Term
ventricles
Definition
bottom chambers of heart. pump blood
Term
artery
Definition
thick muscular blood vessel. brings blood away from heart
Term
vein.
Definition
brings blood to heart. has valves to prevent back flow of blood
Term
capillary
Definition
thin blood vessel. where diffusion occurs
Term
endocrine system and nervous system function
Definition
coordinates the bodies activities
Term
pituitary gland function
Definition
master gland. controls all other glands.
Term
thyroid gland-hormone & function
Definition
hormone: thyroxin
function: controls metabolism (all activities in the body)
Term
what is a disorder of the thyroid gland and why does it occur?
Definition
goiter- thyroid gland enlarges in hopes of making more thyroxin

iodine needed so thyroxin can be produced
Term
parathyroid hormone and function
Definition
hormone: parathormone
function: regulates calcium
Term
pancreas hormones and functions
Definition
insulin: lowers blood sugar
glucagon: lowers blood sugar
Term
diabetes
Definition
person unable to regulate blood sugar
Term
adrenal gland hormone and function
Definition
hormone: adrenaline
function: fight or flight response
Term
excretory system
Definition
removes metabolic wastes from body

ex. UREA, CO2
Term
what does the nephron in the kidney do?
Definition
filters out the blood. regulates the chemical composition of the blood
Term
pathway of waste through the urinary tract
Definition
kidney-->ureter-->bladder-->urethra
Term
glomerolus
Definition
network of capillaries in the kidney that surround the nephron
Term
bowmans capsule
Definition
Part of the nephron that surrounds the glomerolus. This is where substances diffuse into the nephron
Term
pathogen
Definition
foreign invader: bacteria or virus
Term
antigens
Definition
shape specific receptors on pathogens. this is how our body recognizes bacteria and viruses as foreign invaders
Term
phagocytes
Definition
engulf and destroy pathogens
Term
vaccines
Definition
dead or weak pathogen (bacteria or virus)
Term
how do vaccines work?
Definition
the body produces antibodies to fight off the dead or weak pathogen. Then the body produces memory cells so it will be ready to fight it off in the future.
Term
active immunity
Definition
body produces antibodies

ex. if you get sick or get a vaccine
Term
passive immunity
Definition
body is given antibodies

ex. breast milk, antibody injection
Term
describe the pathway of a reflex if a person touches a hot stove
Definition
sensory neuron--> interneuron --> motor neuron
Term
cerebrum
Definition
part of the brain that controls thinking, memory, learning, and the 5 senses
Term
medulla
Definition
part of the brain that controls involuntary activities

ex. breathing, heart beat, digestion
Term
cerebellum
Definition
part of the brain that controls balance and coordination
Term
what is the circulatory system's function?
Definition
transport materials (nutrients, O2, and waste) throughout the body
Term
red blood cells
Definition
carry oxygen
Term
white blood cells
Definition
create an immune response
Term
platlettes
Definition
clot the blood
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