Definition: The way a plant grows or moves in response to sunlight, usually bending towards the light source.

Example: Sunflowers exhibit heliotropism by turning their heads to follow the sun throughout the day.

Definition: A type of small, single-celled organism found in water, known for its star-like shape and long, thin extensions called pseudopods that help it move and capture food.

Example: The heliozoan is often found in freshwater environments, where it plays a role in the ecosystem.

Definition: A light, colorless gas that is used in balloons and for cooling. It is the second element on the periodic table and is found in natural gas and some radioactive materials.

Example: The party was fun, especially with the helium balloons floating around.

Definition: A shape or structure that spirals around a central axis, often resembling a coil or spiral staircase.

Example: The DNA molecule has a double helix structure that is essential for its function.

Definition: A type of worm that lives in or on a host organism, often causing disease; these worms can be roundworms, tapeworms, or other similar parasites.

Example: Doctors often test for helminths in patients who show symptoms of intestinal infections.

Definition: A disease that occurs when a person or animal is infected by parasitic worms.

Example: The doctor diagnosed her with helminthiasis after she showed symptoms of a worm infection.

Definition: Relating to worms, particularly those that are parasitic.

Example: The doctor prescribed a helminthic treatment to eliminate the parasitic infection.

Definition: A substance that helps to remove or kill parasitic worms in the body.

Example: The doctor prescribed a helminthic to treat the patient's infection.

Definition: The scientific study of worms, particularly those that are parasites.

Example: Helminthology is important for understanding diseases caused by parasitic worms.

Definition: A device used to count the number of blood cells in a specific volume of blood.

Example: The researcher used a hemacytometer to determine the concentration of red blood cells in the sample.

Definition: A substance that causes red blood cells to clump together, often found in antibodies or certain viruses.

Example: The hemagglutinin in the virus helps it to attach to and infect host cells.