Science - Human Anatomy and Physiology (Excretion, Reproduction, Senses) Flashcards
what are the principal excretory organs of the body?
kidneys
what is the functional unit of the kidney?
nephron
what does the nephron consist of?
glomerulus, bowman’s capsule, proximal convuluted tubule, loop of henle, distal convuluted tubule
what is the concentrated mixture of wastes that is left in the tubules after circulation through the kidneys?
urine
what are three other functions or organs that are involved in the excretion
sweat glands, lungs and liver
seminiferous tubules
where sperm is made
interstitial cells
produces male sex hormones
epididymis
holds sperm while it matures
what is the route of ejaculation
vas deferens, ejaculatory duct, urethra
oocyte
immature egg
cornea
allows light to enter the eye
iris
color of eye, regulates how much light is allowed to enter pupil
lens
focuses light onto retina
retina
innermost layer of the eyeball
what are the two photoreceptor cells that are inside the eyeball?
rod cells and cone cells
rod cells
sensitive to light, allow us to see at night
cone cells
distinguish color
when they are stimulated by light, the photoreceptor cells transmit the information along the ____ to the brain
optic nerve
what are the three regions of the ear?
outer, middle and inner
what part of the ear collects sounds and transmits them to the tympanic membrane?
outer
what is the tympanic membrane
separates the outer ear from the middle ear
what three bones in the middle ear allow for vibrations to be transmitted
malleus, incus and stapes
what is the eustachian tube
opens into the pharynx
what does the eustachian tube do
equalizes pressure between middle ear and the atmosphere
what region of the ear has many channels containing fluid that moves in response to your movement or to sound?
inner
cochlea
part of the inner ear that allows conversation of movement into signals or action potentials
