Science 12D Flashcards
What is the function of the earthworm’s cuticle?
The cuticle protects the earthworm from harmful parasites and substances
Where in the earthworm’s digestive system does mechanical digestion occur?
a. gizzard
b. esophagus
c. stomach
d. crop
Gizzard
What type of vessel carries blood toward the heart? a. aortic arches
b. veins
c. arteries
d. tubules
Veins
Worms with segmented body (like Earthworm) are classified in phylum __________
Annelida
An Earthworm has a thin skin called the _____? The epidermis secretes a thin outer coating called the _____?
Epidermis
Cuticle
The earthworm moves by using its muscles and tiny bristles called ______ that are on each of its segments
Setae
The body of an earthworm has many _____ _______. These receptors sense a stimulus and then starts an impulse traveling along a nerve cell.
Sensory receptors
True or False. A segmented earthworm has ganglion (simple brains) connected to a nerve chird all over their body?
True
This is the tube throat of a worm that carries food from the pharynx to the crop. The crop is like a stomach.
Esophagus
This organ performs mechanical digestion by grinding the usable food substances against the sand and grit particles in the earthworm’s food.
Gizzard
The parts the earthworm doesnt eat gets passed out this ______. The waste sometimes forms piles outside the earthworm’s tunnels called casts.
Anus
casts
An earthworm’s blood never leaves its blood vessels. What type of circulatory system is this?
Closed circulatory system
The worms “heart” is called what? The blood flows through tubes
away from heart large) =
away from heart (small) =
Toward the heart =
dorsal blood vessel
Artery
Capillary
Vein
True or false? An earthworm breathes with lungs? How?
Its skin
How soon can an earthworm population double?
Few months
