Leeches are soft, squishy animals with long, tube-like bodies that are made of many repeating segments. They contain
a heart that pumps blood through their bodies and survive by attaching to other organisms and sucking their blood.
What animal phylum do leeches belong in?
arthropods
echinoderms
chordates
annelids

Drag each tile to the correct box. the body monitors the levels of oxygen in the blood to regulate breathing. isabel is running in a marathon and is near the finish line. she feels out of breath. how will her nervous system work to generate a reaction? arrange the tiles in chronological order. isabel's breathing rate increases. sensory receptors in the arteries detect low oxygen levels. the brain sends signals through motor neurons. sensory neurons generate an impulse. the central nervous system relays an impulse to certain brain regions.