Biology: Hydra Flashcards
describe digestion “area”
sac like digestive cavity with a single opening
does it have any specialized parts for chewing or cutting food
no
how is food pushed into the digestive cavity
by tentacles and tehn partial extracellular digeston occurs
endocytosis
when the partially digested food is brought into cells
explain hydras transport system
no specialized transport system, only 2 cells thick so all cells are in direct contact with environment, diffusion
how does diffusion impact the hydra
respiration gasses are diffused
wastes excreted by diffusion
explain how the neuron acts as the hydras nerve system
when any neuron is stimulated the impulse travels over entire nerve net
how do hydras move
normally stay in one place but somersaulting
explain how hydras reproduce
asexual-budding when conditions are good
sexual-egg and sperm when conditions are harsh
