Seaweed
Organism
True. Hunger is internal, a voice is external.
how can respiatory system respond to internal and external stimuli
Living organisms respond to stimuli (singular - a stimulus) in the environment.
homeostatosis
Lightning does not have cells, does not have a metabolism, does not reproduce, does not maintain homeostasis, and does not respond to stimuli.
One of the things that making an organism alive is its' response to stimuli. This can be internal or external.
ventral
respond
Growth
Stimuli itself is of two types - external stimuli and internal stimuli. External stimuli refers to touch, pressure, heat etc. Internal stimuli refers to the stimuli produced by body components - like hormones etc.
The senses of taste and smell respond to chemical stimuli.